diff --git a/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaTest.scala b/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaTest.scala
index 9395daa1da479d97d5b5bd822379be5085b67c6c..e47797cc7482900cd9084774320ef174eb79e6e2 100644
--- a/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaTest.scala
+++ b/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaTest.scala
@@ -93,6 +93,12 @@ class ShivaTest extends TestNGSuite with Matchers {
 
 object ShivaTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+  def inputTouch(name: String): String = {
+    val file = new File(outputDir, "input" + File.separator + name)
+    Files.touch(file)
+    file.getAbsolutePath
+  }
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
@@ -136,8 +142,8 @@ object ShivaTest {
   val sample1 = Map(
     "samples" -> Map("sample1" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "1_1_R1.fq",
-        "R2" -> "1_1_R2.fq"
+        "R1" -> inputTouch("1_1_R1.fq"),
+        "R2" -> inputTouch("1_1_R2.fq")
       )
     )
     )))
@@ -145,8 +151,8 @@ object ShivaTest {
   val sample2 = Map(
     "samples" -> Map("sample2" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "2_1_R1.fq",
-        "R2" -> "2_1_R2.fq"
+        "R1" -> inputTouch("2_1_R1.fq"),
+        "R2" -> inputTouch("2_1_R2.fq")
       )
     )
     )))
@@ -154,12 +160,12 @@ object ShivaTest {
   val sample3 = Map(
     "samples" -> Map("sample3" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "3_1_R1.fq",
-        "R2" -> "3_1_R2.fq"
+        "R1" -> inputTouch("3_1_R1.fq"),
+        "R2" -> inputTouch("3_1_R2.fq")
       ),
       "lib2" -> Map(
-        "R1" -> "3_2_R1.fq",
-        "R2" -> "3_2_R2.fq"
+        "R1" -> inputTouch("3_2_R1.fq"),
+        "R2" -> inputTouch("3_2_R2.fq")
       )
     )
     )))
diff --git a/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaVariantcallingTest.scala b/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaVariantcallingTest.scala
index 2c60207a82fae9da823eb02d7a860b5dd8be1834..8e8a1eddf9e5d6b5aab36c4c6fea7d35ea2da82e 100644
--- a/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaVariantcallingTest.scala
+++ b/protected/biopet-gatk-pipelines/src/test/scala/nl/lumc/sasc/biopet/pipelines/gatk/ShivaVariantcallingTest.scala
@@ -73,7 +73,7 @@ class ShivaVariantcallingTest extends TestNGSuite with Matchers {
     val map = Map("variantcallers" -> callers.toList)
     val pipeline = initPipeline(map)
 
-    pipeline.inputBams = (for (n <- 1 to bams) yield new File("bam_" + n + ".bam")).toList
+    pipeline.inputBams = (for (n <- 1 to bams) yield ShivaVariantcallingTest.inputTouch("bam_" + n + ".bam")).toList
 
     val illegalArgumentException = pipeline.inputBams.isEmpty ||
       (!raw && !bcftools &&
@@ -107,6 +107,12 @@ class ShivaVariantcallingTest extends TestNGSuite with Matchers {
 
 object ShivaVariantcallingTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+  def inputTouch(name: String): File = {
+    val file = new File(outputDir, "input" + File.separator + name).getAbsoluteFile
+    Files.touch(file)
+    file
+  }
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
diff --git a/public/bam2wig/src/main/scala/nl/lumc/sasc/biopet/pipelines/bamtobigwig/Bam2Wig.scala b/public/bam2wig/src/main/scala/nl/lumc/sasc/biopet/pipelines/bamtobigwig/Bam2Wig.scala
index 451350227e5620ae612212eb341e0acae49ad958..fb9e39611fd861f9158503581f17d4bd12e6cb30 100644
--- a/public/bam2wig/src/main/scala/nl/lumc/sasc/biopet/pipelines/bamtobigwig/Bam2Wig.scala
+++ b/public/bam2wig/src/main/scala/nl/lumc/sasc/biopet/pipelines/bamtobigwig/Bam2Wig.scala
@@ -35,6 +35,7 @@ class Bam2Wig(val root: Configurable) extends QScript with BiopetQScript {
   var bamFile: File = null
 
   def init(): Unit = {
+    inputFiles :+= new InputFile(bamFile)
   }
 
   def biopetScript(): Unit = {
diff --git a/public/bammetrics/src/main/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetrics.scala b/public/bammetrics/src/main/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetrics.scala
index defb8361c68974ccffdddcba26dbe7700d58fea2..f6a6dc090defdb238f76b68f21189faf38fd207c 100644
--- a/public/bammetrics/src/main/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetrics.scala
+++ b/public/bammetrics/src/main/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetrics.scala
@@ -71,7 +71,8 @@ class BamMetrics(val root: Configurable) extends QScript with SummaryQScript wit
   }
 
   /** executed before script */
-  def init() {
+  def init(): Unit = {
+    inputFiles :+= new InputFile(inputBam)
   }
 
   /** Script to add jobs */
diff --git a/public/bammetrics/src/test/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetricsTest.scala b/public/bammetrics/src/test/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetricsTest.scala
index 7e97b4a78e1176b1603a7ae5aec10057c4bd0175..33304cb198807f46d3801ddfc9b05eaa7d555fe4 100644
--- a/public/bammetrics/src/test/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetricsTest.scala
+++ b/public/bammetrics/src/test/scala/nl/lumc/sasc/biopet/pipelines/bammetrics/BamMetricsTest.scala
@@ -69,7 +69,7 @@ class BamMetricsTest extends TestNGSuite with Matchers {
       Map("regions_of_interest" -> (1 to rois).map("roi_" + _ + ".bed").toList)
     val bammetrics: BamMetrics = initPipeline(map)
 
-    bammetrics.inputBam = new File("input.bam")
+    bammetrics.inputBam = BamMetricsTest.bam
     bammetrics.sampleId = Some("1")
     bammetrics.libId = Some("1")
     bammetrics.script()
@@ -98,6 +98,10 @@ class BamMetricsTest extends TestNGSuite with Matchers {
 
 object BamMetricsTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+
+  val bam = new File(outputDir, "input" + File.separator + "bla.bam")
+  Files.touch(bam)
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
diff --git a/public/basty/src/main/scala/nl/lumc/sasc/biopet/pipelines/basty/BastyTrait.scala b/public/basty/src/main/scala/nl/lumc/sasc/biopet/pipelines/basty/BastyTrait.scala
index 1990085cef63fc60c637e04bb17811a20b837f85..a2a1f832843072d5abc9d46fb0280ba3b2c19ea4 100644
--- a/public/basty/src/main/scala/nl/lumc/sasc/biopet/pipelines/basty/BastyTrait.scala
+++ b/public/basty/src/main/scala/nl/lumc/sasc/biopet/pipelines/basty/BastyTrait.scala
@@ -89,6 +89,8 @@ trait BastyTrait extends MultiSampleQScript {
     addAll(shiva.functions)
     addSummaryQScript(shiva)
 
+    inputFiles :::= shiva.inputFiles
+
     addSamplesJobs()
   }
 
diff --git a/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/BiopetQScript.scala b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/BiopetQScript.scala
index c84c9faa84c187efbc2f20d0e6599784b7f2db26..fa714c9423707456f1f6d1cfa6f2617c44318218 100644
--- a/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/BiopetQScript.scala
+++ b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/BiopetQScript.scala
@@ -48,6 +48,10 @@ trait BiopetQScript extends Configurable with GatkLogging {
 
   var outputFiles: Map[String, File] = Map()
 
+  type InputFile = BiopetQScript.InputFile
+
+  var inputFiles: List[InputFile] = Nil
+
   /** Get implemented from org.broadinstitute.gatk.queue.QScript */
   var qSettings: QSettings
 
@@ -86,6 +90,11 @@ trait BiopetQScript extends Configurable with GatkLogging {
       globalConfig.writeReport(qSettings.runName, new File(outputDir, ".log/" + qSettings.runName))
     else Logging.addError("Parent of output dir: '" + outputDir.getParent + "' is not writeable, outputdir can not be created")
 
+    inputFiles.foreach { i =>
+      if (!i.file.exists()) Logging.addError(s"Input file does not exist: ${i.file}")
+      else if (!i.file.canRead()) Logging.addError(s"Input file can not be read: ${i.file}")
+    }
+    
     this match {
       case q: MultiSampleQScript if q.onlySamples.nonEmpty && !q.samples.forall(x => q.onlySamples.contains(x._1)) =>
         logger.info("Write report is skipped because sample flag is used")
@@ -107,3 +116,7 @@ trait BiopetQScript extends Configurable with GatkLogging {
     add(function)
   }
 }
+
+object BiopetQScript {
+  protected case class InputFile(file: File, md5: Option[String] = None)
+}
\ No newline at end of file
diff --git a/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/extensions/CheckChecksum.scala b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/extensions/CheckChecksum.scala
new file mode 100644
index 0000000000000000000000000000000000000000..0ae2587f7928bb8d8cfe3e157f79fec7afff031a
--- /dev/null
+++ b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/extensions/CheckChecksum.scala
@@ -0,0 +1,40 @@
+package nl.lumc.sasc.biopet.core.extensions
+
+import java.io.File
+
+import nl.lumc.sasc.biopet.core.summary.WriteSummary
+import org.broadinstitute.gatk.queue.function.InProcessFunction
+import org.broadinstitute.gatk.utils.commandline.{ Argument, Input }
+
+/**
+ * This class checks md5sums and give an exit code 1 when md5sum is not the same
+ *
+ * Created by pjvanthof on 16/08/15.
+ */
+class CheckChecksum extends InProcessFunction {
+  @Input(required = true)
+  var inputFile: File = _
+
+  @Input(required = true)
+  var checksumFile: File = _
+
+  @Argument(required = true)
+  var checksum: String = _
+
+  override def freezeFieldValues(): Unit = {
+    super.freezeFieldValues()
+    jobOutputFile = new File(checksumFile.getParentFile, checksumFile.getName + ".check.out")
+  }
+
+  /** Exits whenever the input md5sum is not the same as the output md5sum */
+  def run: Unit = {
+    val outputChecksum = WriteSummary.parseChecksum(checksumFile).toLowerCase
+
+    if (outputChecksum != checksum.toLowerCase) {
+      logger.error(s"Input file: '$inputFile' md5sum is not as expected, aborting pipeline")
+
+      // 130 Simulates a ctr-C
+      Runtime.getRuntime.halt(130)
+    }
+  }
+}
\ No newline at end of file
diff --git a/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/SummaryQScript.scala b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/SummaryQScript.scala
index 7f0fce673b9b9f053c871ef4c2ba283f9dea36cb..6eaae5391f4712b427cc0307d7a480d1aee1e712 100644
--- a/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/SummaryQScript.scala
+++ b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/SummaryQScript.scala
@@ -18,7 +18,7 @@ package nl.lumc.sasc.biopet.core.summary
 import java.io.File
 
 import nl.lumc.sasc.biopet.core._
-import nl.lumc.sasc.biopet.core.extensions.Md5sum
+import nl.lumc.sasc.biopet.core.extensions.{ CheckChecksum, Md5sum }
 
 import scala.collection.mutable
 
@@ -27,7 +27,7 @@ import scala.collection.mutable
  *
  * Created by pjvan_thof on 2/14/15.
  */
-trait SummaryQScript extends BiopetQScript {
+trait SummaryQScript extends BiopetQScript { qscript =>
 
   /** Key is sample/library, None is sample or library is not applicable */
   private[summary] var summarizables: Map[(String, Option[String], Option[String]), List[Summarizable]] = Map()
@@ -116,6 +116,20 @@ trait SummaryQScript extends BiopetQScript {
       //TODO: add more checksums types
     }
 
+    for (inputFile <- inputFiles) {
+      inputFile.md5 match {
+        case Some(checksum) => {
+          val checkMd5 = new CheckChecksum
+          checkMd5.inputFile = inputFile.file
+          require(SummaryQScript.md5sumCache.contains(inputFile.file), "Md5 job is not executed, checksum file can't be found")
+          checkMd5.checksumFile = SummaryQScript.md5sumCache(inputFile.file)
+          checkMd5.checksum = checksum
+          add(checkMd5)
+        }
+        case _ =>
+      }
+    }
+
     for ((_, summarizableList) <- summarizables; summarizable <- summarizableList) {
       summarizable match {
         case f: BiopetCommandLineFunctionTrait => f.beforeGraph()
diff --git a/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/WriteSummary.scala b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/WriteSummary.scala
index 3db4607d6288f84b204033ee3db186ee76771935..3530e4d0ad05f1916ccf344e625bbe5b097c0f65 100644
--- a/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/WriteSummary.scala
+++ b/public/biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/summary/WriteSummary.scala
@@ -153,10 +153,11 @@ class WriteSummary(val root: Configurable) extends InProcessFunction with Config
   def parseFile(file: File): Map[String, Any] = {
     val map: mutable.Map[String, Any] = mutable.Map()
     map += "path" -> file.getAbsolutePath
-    if (md5sum) map += "md5" -> parseChecksum(SummaryQScript.md5sumCache(file))
+    if (md5sum) map += "md5" -> WriteSummary.parseChecksum(SummaryQScript.md5sumCache(file))
     map.toMap
   }
-
+}
+object WriteSummary {
   /** Retrive checksum from file */
   def parseChecksum(checksumFile: File): String = {
     Source.fromFile(checksumFile).getLines().toList.head.split(" ")(0)
diff --git a/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/MpileupToVcf.scala b/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/MpileupToVcf.scala
index 5a3e1e3f26588c103a4bf5e0a190aa223d064450..e5ba10717a5e32b3baf4dbe059d64dccfdcdcc61 100644
--- a/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/MpileupToVcf.scala
+++ b/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/MpileupToVcf.scala
@@ -57,7 +57,7 @@ class MpileupToVcf(val root: Configurable) extends ToolCommandFuntion with Refer
   }
 
   override def beforeCmd(): Unit = {
-    if (sample == null && inputBam.exists()) {
+    if (sample == null && inputBam.exists() && inputBam.length() > 0) {
       val inputSam = SamReaderFactory.makeDefault.open(inputBam)
       val readGroups = inputSam.getFileHeader.getReadGroups
       val samples = readGroups.map(readGroup => readGroup.getSample).distinct
diff --git a/public/carp/src/main/scala/nl/lumc/sasc/biopet/pipelines/carp/Carp.scala b/public/carp/src/main/scala/nl/lumc/sasc/biopet/pipelines/carp/Carp.scala
index 195718d5de9f0b708c2bcbc64faaf927109c176f..f8b4dc6db0ff771d046ffe320a24a7c0d294b832 100644
--- a/public/carp/src/main/scala/nl/lumc/sasc/biopet/pipelines/carp/Carp.scala
+++ b/public/carp/src/main/scala/nl/lumc/sasc/biopet/pipelines/carp/Carp.scala
@@ -78,6 +78,10 @@ class Carp(val root: Configurable) extends QScript with MultiSampleQScript with
         if (config.contains("R1")) {
           mapping.input_R1 = config("R1")
           if (config.contains("R2")) mapping.input_R2 = config("R2")
+
+          inputFiles :+= new InputFile(mapping.input_R1, config("R1_md5"))
+          mapping.input_R2.foreach(inputFiles :+= new InputFile(_, config("R2_md5")))
+
           mapping.init()
           mapping.biopetScript()
           addAll(mapping.functions)
diff --git a/public/carp/src/test/scala/nl/lumc/sasc/biopet/pipelines/carp/CarpTest.scala b/public/carp/src/test/scala/nl/lumc/sasc/biopet/pipelines/carp/CarpTest.scala
index c361908fa1110ef7133639e91912acab5cce0da9..407b6fb415a4dbce63a80228241b7a81df29cf36 100644
--- a/public/carp/src/test/scala/nl/lumc/sasc/biopet/pipelines/carp/CarpTest.scala
+++ b/public/carp/src/test/scala/nl/lumc/sasc/biopet/pipelines/carp/CarpTest.scala
@@ -97,6 +97,12 @@ class CarpTest extends TestNGSuite with Matchers {
 
 object CarpTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+  def inputTouch(name: String): String = {
+    val file = new File(outputDir, "input" + File.separator + name)
+    Files.touch(file)
+    file.getAbsolutePath
+  }
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
@@ -127,8 +133,8 @@ object CarpTest {
   val sample1 = Map(
     "samples" -> Map("sample1" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "1_1_R1.fq",
-        "R2" -> "1_1_R2.fq"
+        "R1" -> inputTouch("1_1_R1.fq"),
+        "R2" -> inputTouch("1_1_R2.fq")
       )
     )
     )))
@@ -136,8 +142,8 @@ object CarpTest {
   val sample2 = Map(
     "samples" -> Map("sample2" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "2_1_R1.fq",
-        "R2" -> "2_1_R2.fq"
+        "R1" -> inputTouch("2_1_R1.fq"),
+        "R2" -> inputTouch("2_1_R2.fq")
       )
     )
     )))
@@ -145,12 +151,12 @@ object CarpTest {
   val sample3 = Map(
     "samples" -> Map("sample3" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "3_1_R1.fq",
-        "R2" -> "3_1_R2.fq"
+        "R1" -> inputTouch("3_1_R1.fq"),
+        "R2" -> inputTouch("3_1_R2.fq")
       ),
       "lib2" -> Map(
-        "R1" -> "3_2_R1.fq",
-        "R2" -> "3_2_R2.fq"
+        "R1" -> inputTouch("3_2_R1.fq"),
+        "R2" -> inputTouch("3_2_R2.fq")
       )
     )
     )))
@@ -158,8 +164,8 @@ object CarpTest {
   val threatment1 = Map(
     "samples" -> Map("threatment" -> Map("control" -> "control1", "libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "threatment_1_R1.fq",
-        "R2" -> "threatment_1_R2.fq"
+        "R1" -> inputTouch("threatment_1_R1.fq"),
+        "R2" -> inputTouch("threatment_1_R2.fq")
       )
     )
     )))
@@ -167,8 +173,8 @@ object CarpTest {
   val control1 = Map(
     "samples" -> Map("control1" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "control_1_R1.fq",
-        "R2" -> "control_1_R2.fq"
+        "R1" -> inputTouch("control_1_R1.fq"),
+        "R2" -> inputTouch("control_1_R2.fq")
       )
     )
     )))
diff --git a/public/flexiprep/src/main/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/Flexiprep.scala b/public/flexiprep/src/main/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/Flexiprep.scala
index 07c356b7a894d5797002751d264a4b24e3ba5e7e..7ae2730c2bd92c3c06e10ecb2452cc3d1e823933 100644
--- a/public/flexiprep/src/main/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/Flexiprep.scala
+++ b/public/flexiprep/src/main/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/Flexiprep.scala
@@ -85,6 +85,9 @@ class Flexiprep(val root: Configurable) extends QScript with SummaryQScript with
 
     paired = input_R2.isDefined
 
+    inputFiles :+= new InputFile(input_R1)
+    input_R2.foreach(inputFiles :+= new InputFile(_))
+
     if (input_R1.endsWith(".gz")) R1_name = input_R1.getName.substring(0, input_R1.getName.lastIndexOf(".gz"))
     else if (input_R1.endsWith(".gzip")) R1_name = input_R1.getName.substring(0, input_R1.getName.lastIndexOf(".gzip"))
     else R1_name = input_R1.getName
diff --git a/public/flexiprep/src/test/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/FlexiprepTest.scala b/public/flexiprep/src/test/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/FlexiprepTest.scala
index 2cb3f0e7b36175d9bf7633d7d639e6b03612976f..7b6716024963be03f256eb31bfad2bf5bcdf769e 100644
--- a/public/flexiprep/src/test/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/FlexiprepTest.scala
+++ b/public/flexiprep/src/test/scala/nl/lumc/sasc/biopet/pipelines/flexiprep/FlexiprepTest.scala
@@ -67,8 +67,8 @@ class FlexiprepTest extends TestNGSuite with Matchers {
     ), Map(FlexiprepTest.executables.toSeq: _*))
     val flexiprep: Flexiprep = initPipeline(map)
 
-    flexiprep.input_R1 = new File(flexiprep.outputDir, "bla_R1.fq" + (if (zipped) ".gz" else ""))
-    if (paired) flexiprep.input_R2 = Some(new File(flexiprep.outputDir, "bla_R2.fq" + (if (zipped) ".gz" else "")))
+    flexiprep.input_R1 = (if (zipped) FlexiprepTest.r1Zipped else FlexiprepTest.r1)
+    if (paired) flexiprep.input_R2 = Some((if (zipped) FlexiprepTest.r2Zipped else FlexiprepTest.r2))
     flexiprep.sampleId = Some("1")
     flexiprep.libId = Some("1")
     flexiprep.script()
@@ -95,6 +95,16 @@ class FlexiprepTest extends TestNGSuite with Matchers {
 
 object FlexiprepTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+
+  val r1 = new File(outputDir, "input" + File.separator + "R1.fq")
+  Files.touch(r1)
+  val r2 = new File(outputDir, "input" + File.separator + "R2.fq")
+  Files.touch(r2)
+  val r1Zipped = new File(outputDir, "input" + File.separator + "R1.fq.gz")
+  Files.touch(r1Zipped)
+  val r2Zipped = new File(outputDir, "input" + File.separator + "R2.fq.gz")
+  Files.touch(r2Zipped)
 
   val executables = Map(
     "seqstat" -> Map("exe" -> "test"),
diff --git a/public/gentrap/src/main/scala/nl/lumc/sasc/biopet/pipelines/gentrap/Gentrap.scala b/public/gentrap/src/main/scala/nl/lumc/sasc/biopet/pipelines/gentrap/Gentrap.scala
index c500757088d3c313190cb4a9b0eca65bfc48f9a4..d033594c6e42663427108baf12038b7eed6fb3f6 100644
--- a/public/gentrap/src/main/scala/nl/lumc/sasc/biopet/pipelines/gentrap/Gentrap.scala
+++ b/public/gentrap/src/main/scala/nl/lumc/sasc/biopet/pipelines/gentrap/Gentrap.scala
@@ -844,6 +844,8 @@ class Gentrap(val root: Configurable) extends QScript
       def addJobs(): Unit = {
         // create per-library alignment file
         addAll(mappingJob.functions)
+        // Input file checking
+        inputFiles :::= mappingJob.inputFiles
         // add bigwig track
         addAll(bam2wigModule.functions)
         qscript.addSummaryQScript(mappingJob)
diff --git a/public/gentrap/src/test/scala/nl/lumc/sasc/biopet/pipelines/gentrap/GentrapTest.scala b/public/gentrap/src/test/scala/nl/lumc/sasc/biopet/pipelines/gentrap/GentrapTest.scala
index 140db66fd62dd850365b27137cc3df0891bd38a7..2b2ddaf259e8fa5ad382ef1aca1337826ecf0ad8 100644
--- a/public/gentrap/src/test/scala/nl/lumc/sasc/biopet/pipelines/gentrap/GentrapTest.scala
+++ b/public/gentrap/src/test/scala/nl/lumc/sasc/biopet/pipelines/gentrap/GentrapTest.scala
@@ -43,8 +43,8 @@ class GentrapTest extends TestNGSuite with Matchers {
 
   /** Convenience method for making library config */
   private def makeLibConfig(idx: Int, paired: Boolean = true) = {
-    val files = Map("R1" -> "test_R1.fq")
-    if (paired) (s"lib_$idx", files ++ Map("R2" -> "test_R2.fq"))
+    val files = Map("R1" -> GentrapTest.inputTouch("test_R1.fq"))
+    if (paired) (s"lib_$idx", files ++ Map("R2" -> GentrapTest.inputTouch("test_R2.fq")))
     else (s"lib_$idx", files)
   }
 
@@ -179,6 +179,12 @@ class GentrapTest extends TestNGSuite with Matchers {
 
 object GentrapTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+  def inputTouch(name: String): String = {
+    val file = new File(outputDir, "input" + File.separator + name)
+    Files.touch(file)
+    file.getAbsolutePath
+  }
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
diff --git a/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala b/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala
index 9d508b12ce727acb0bdfdf52fc485b8e353e5dae..3c886ee3a7c04544953e02a29d960a9436559bcb 100644
--- a/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala
+++ b/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala
@@ -137,6 +137,9 @@ class Mapping(val root: Configurable) extends QScript with SummaryQScript with S
     require(sampleId.isDefined, "Missing sample ID on mapping module")
     require(libId.isDefined, "Missing library ID on mapping module")
 
+    inputFiles :+= new InputFile(input_R1)
+    input_R2.foreach(inputFiles :+= new InputFile(_))
+
     paired = input_R2.isDefined
 
     if (readgroupId == null) readgroupId = sampleId.get + "-" + libId.get
diff --git a/public/mapping/src/test/scala/nl/lumc/sasc/biopet/pipelines/mapping/MappingTest.scala b/public/mapping/src/test/scala/nl/lumc/sasc/biopet/pipelines/mapping/MappingTest.scala
index 849bffcb6998f31e8d527af465de68775b6e11a4..3c28181101a75eafa1518e441fb457a5ae197099 100644
--- a/public/mapping/src/test/scala/nl/lumc/sasc/biopet/pipelines/mapping/MappingTest.scala
+++ b/public/mapping/src/test/scala/nl/lumc/sasc/biopet/pipelines/mapping/MappingTest.scala
@@ -79,11 +79,11 @@ class MappingTest extends TestNGSuite with Matchers {
     val mapping: Mapping = initPipeline(map)
 
     if (zipped) {
-      mapping.input_R1 = new File(mapping.outputDir, "bla_R1.fq.gz")
-      if (paired) mapping.input_R2 = Some(new File(mapping.outputDir, "bla_R2.fq.gz"))
+      mapping.input_R1 = MappingTest.r1Zipped
+      if (paired) mapping.input_R2 = Some(MappingTest.r2Zipped)
     } else {
-      mapping.input_R1 = new File(mapping.outputDir, "bla_R1.fq")
-      if (paired) mapping.input_R2 = Some(new File(mapping.outputDir, "bla_R2.fq"))
+      mapping.input_R1 = MappingTest.r1
+      if (paired) mapping.input_R2 = Some(MappingTest.r2)
     }
     mapping.sampleId = Some("1")
     mapping.libId = Some("1")
@@ -131,6 +131,16 @@ class MappingTest extends TestNGSuite with Matchers {
 
 object MappingTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+
+  val r1 = new File(outputDir, "input" + File.separator + "R1.fq")
+  Files.touch(r1)
+  val r2 = new File(outputDir, "input" + File.separator + "R2.fq")
+  Files.touch(r2)
+  val r1Zipped = new File(outputDir, "input" + File.separator + "R1.fq.gz")
+  Files.touch(r1Zipped)
+  val r2Zipped = new File(outputDir, "input" + File.separator + "R2.fq.gz")
+  Files.touch(r2Zipped)
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
diff --git a/public/sage/src/main/scala/nl/lumc/sasc/biopet/pipelines/sage/Sage.scala b/public/sage/src/main/scala/nl/lumc/sasc/biopet/pipelines/sage/Sage.scala
index 4aaee19c295de32dbc306a94cf6fecf63d1ba754..2ee8c3b1930aff553234f6f3860d7c13e0818783 100644
--- a/public/sage/src/main/scala/nl/lumc/sasc/biopet/pipelines/sage/Sage.scala
+++ b/public/sage/src/main/scala/nl/lumc/sasc/biopet/pipelines/sage/Sage.scala
@@ -88,6 +88,8 @@ class Sage(val root: Configurable) extends QScript with MultiSampleQScript {
       mapping.sampleId = Some(sampleId)
 
       protected def addJobs(): Unit = {
+        inputFiles :+= new InputFile(inputFastq, config("R1_md5"))
+
         flexiprep.outputDir = new File(libDir, "flexiprep/")
         flexiprep.input_R1 = inputFastq
         flexiprep.init()
diff --git a/public/shiva/src/main/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTrait.scala b/public/shiva/src/main/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTrait.scala
index 3f65bf2a20864e2017f512981daa0d37aca52772..dafb2e1ccc5a72807aa37cc6858711afbfe78c23 100644
--- a/public/shiva/src/main/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTrait.scala
+++ b/public/shiva/src/main/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTrait.scala
@@ -136,51 +136,56 @@ trait ShivaTrait extends MultiSampleQScript with SummaryQScript with Reference {
           case (true, _) => mapping.foreach(mapping => {
             mapping.input_R1 = config("R1")
             mapping.input_R2 = config("R2")
+            inputFiles :+= new InputFile(mapping.input_R1, config("R1_md5"))
+            mapping.input_R2.foreach(inputFiles :+= new InputFile(_, config("R2_md5")))
           })
-          case (false, true) => config("bam_to_fastq", default = false).asBoolean match {
-            case true =>
-              val samToFastq = SamToFastq(qscript, config("bam"),
-                new File(libDir, sampleId + "-" + libId + ".R1.fastq"),
-                new File(libDir, sampleId + "-" + libId + ".R2.fastq"))
-              samToFastq.isIntermediate = true
-              qscript.add(samToFastq)
-              mapping.foreach(mapping => {
-                mapping.input_R1 = samToFastq.fastqR1
-                mapping.input_R2 = Some(samToFastq.fastqR2)
-              })
-            case false =>
-              val inputSam = SamReaderFactory.makeDefault.open(config("bam"))
-              val readGroups = inputSam.getFileHeader.getReadGroups
-
-              val readGroupOke = readGroups.forall(readGroup => {
-                if (readGroup.getSample != sampleId) logger.warn("Sample ID readgroup in bam file is not the same")
-                if (readGroup.getLibrary != libId) logger.warn("Library ID readgroup in bam file is not the same")
-                readGroup.getSample == sampleId && readGroup.getLibrary == libId
-              })
-              inputSam.close()
-
-              if (!readGroupOke) {
-                if (config("correct_readgroups", default = false).asBoolean) {
-                  logger.info("Correcting readgroups, file:" + config("bam"))
-                  val aorrg = AddOrReplaceReadGroups(qscript, config("bam"), bamFile.get)
-                  aorrg.RGID = sampleId + "-" + libId
-                  aorrg.RGLB = libId
-                  aorrg.RGSM = sampleId
-                  aorrg.isIntermediate = true
-                  qscript.add(aorrg)
-                } else throw new IllegalStateException("Sample readgroup and/or library of input bamfile is not correct, file: " + bamFile +
-                  "\nPlease note that it is possible to set 'correct_readgroups' to true in the config to automatic fix this")
-              } else {
-                val oldBamFile: File = config("bam")
-                val oldIndex: File = new File(oldBamFile.getAbsolutePath.stripSuffix(".bam") + ".bai")
-                val newIndex: File = new File(libDir, oldBamFile.getName.stripSuffix(".bam") + ".bai")
-                val baiLn = Ln(qscript, oldIndex, newIndex)
-                add(baiLn)
-
-                val bamLn = Ln(qscript, oldBamFile, bamFile.get)
-                bamLn.deps :+= baiLn.output
-                add(bamLn)
-              }
+          case (false, true) => {
+            inputFiles :+= new InputFile(config("bam"), config("bam_md5"))
+            config("bam_to_fastq", default = false).asBoolean match {
+              case true =>
+                val samToFastq = SamToFastq(qscript, config("bam"),
+                  new File(libDir, sampleId + "-" + libId + ".R1.fastq"),
+                  new File(libDir, sampleId + "-" + libId + ".R2.fastq"))
+                samToFastq.isIntermediate = true
+                qscript.add(samToFastq)
+                mapping.foreach(mapping => {
+                  mapping.input_R1 = samToFastq.fastqR1
+                  mapping.input_R2 = Some(samToFastq.fastqR2)
+                })
+              case false =>
+                val inputSam = SamReaderFactory.makeDefault.open(config("bam"))
+                val readGroups = inputSam.getFileHeader.getReadGroups
+
+                val readGroupOke = readGroups.forall(readGroup => {
+                  if (readGroup.getSample != sampleId) logger.warn("Sample ID readgroup in bam file is not the same")
+                  if (readGroup.getLibrary != libId) logger.warn("Library ID readgroup in bam file is not the same")
+                  readGroup.getSample == sampleId && readGroup.getLibrary == libId
+                })
+                inputSam.close()
+
+                if (!readGroupOke) {
+                  if (config("correct_readgroups", default = false).asBoolean) {
+                    logger.info("Correcting readgroups, file:" + config("bam"))
+                    val aorrg = AddOrReplaceReadGroups(qscript, config("bam"), bamFile.get)
+                    aorrg.RGID = sampleId + "-" + libId
+                    aorrg.RGLB = libId
+                    aorrg.RGSM = sampleId
+                    aorrg.isIntermediate = true
+                    qscript.add(aorrg)
+                  } else throw new IllegalStateException("Sample readgroup and/or library of input bamfile is not correct, file: " + bamFile +
+                    "\nPlease note that it is possible to set 'correct_readgroups' to true in the config to automatic fix this")
+                } else {
+                  val oldBamFile: File = config("bam")
+                  val oldIndex: File = new File(oldBamFile.getAbsolutePath.stripSuffix(".bam") + ".bai")
+                  val newIndex: File = new File(libDir, oldBamFile.getName.stripSuffix(".bam") + ".bai")
+                  val baiLn = Ln(qscript, oldIndex, newIndex)
+                  add(baiLn)
+
+                  val bamLn = Ln(qscript, oldBamFile, bamFile.get)
+                  bamLn.deps :+= baiLn.output
+                  add(bamLn)
+                }
+            }
           }
           case _ => logger.warn("Sample: " + sampleId + "  Library: " + libId + ", no reads found")
         }
@@ -294,7 +299,7 @@ trait ShivaTrait extends MultiSampleQScript with SummaryQScript with Reference {
       addAll(vc.functions)
       addSummaryQScript(vc)
 
-      if (config("annotation", default = true).asBoolean) {
+      if (config("annotation", default = false).asBoolean) {
         val toucan = new Toucan(this)
         toucan.outputDir = new File(outputDir, "annotation")
         toucan.inputVCF = vc.finalFile
diff --git a/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTest.scala b/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTest.scala
index 56b6bf172b2d122b2ccd70818d3f9f92161e270d..cff186c29e8776f4457ceb6787ea75efc61a8885 100644
--- a/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTest.scala
+++ b/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaTest.scala
@@ -88,6 +88,12 @@ class ShivaTest extends TestNGSuite with Matchers {
 
 object ShivaTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+  def inputTouch(name: String): String = {
+    val file = new File(outputDir, "input" + File.separator + name)
+    Files.touch(file)
+    file.getAbsolutePath
+  }
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
@@ -131,8 +137,8 @@ object ShivaTest {
   val sample1 = Map(
     "samples" -> Map("sample1" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "1_1_R1.fq",
-        "R2" -> "1_1_R2.fq"
+        "R1" -> inputTouch("1_1_R1.fq"),
+        "R2" -> inputTouch("1_1_R2.fq")
       )
     )
     )))
@@ -140,8 +146,8 @@ object ShivaTest {
   val sample2 = Map(
     "samples" -> Map("sample2" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "2_1_R1.fq",
-        "R2" -> "2_1_R2.fq"
+        "R1" -> inputTouch("2_1_R1.fq"),
+        "R2" -> inputTouch("2_1_R2.fq")
       )
     )
     )))
@@ -149,12 +155,12 @@ object ShivaTest {
   val sample3 = Map(
     "samples" -> Map("sample3" -> Map("libraries" -> Map(
       "lib1" -> Map(
-        "R1" -> "3_1_R1.fq",
-        "R2" -> "3_1_R2.fq"
+        "R1" -> inputTouch("3_1_R1.fq"),
+        "R2" -> inputTouch("3_1_R2.fq")
       ),
       "lib2" -> Map(
-        "R1" -> "3_2_R1.fq",
-        "R2" -> "3_2_R2.fq"
+        "R1" -> inputTouch("3_2_R1.fq"),
+        "R2" -> inputTouch("3_2_R2.fq")
       )
     )
     )))
diff --git a/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaVariantcallingTest.scala b/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaVariantcallingTest.scala
index 0281d33f678804d7edd1620d204a0830d4f3201f..caeea0326d46e4b7673dae4a3d07f27c3cbd5f4e 100644
--- a/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaVariantcallingTest.scala
+++ b/public/shiva/src/test/scala/nl/lumc/sasc/biopet/pipelines/shiva/ShivaVariantcallingTest.scala
@@ -61,7 +61,7 @@ class ShivaVariantcallingTest extends TestNGSuite with Matchers {
     val map = Map("variantcallers" -> callers.toList)
     val pipeline = initPipeline(map)
 
-    pipeline.inputBams = (for (n <- 1 to bams) yield new File("bam_" + n + ".bam")).toList
+    pipeline.inputBams = (for (n <- 1 to bams) yield ShivaVariantcallingTest.inputTouch("bam_" + n + ".bam")).toList
 
     val illegalArgumentException = pipeline.inputBams.isEmpty || (!raw && !bcftools && !freebayes)
 
@@ -88,6 +88,12 @@ class ShivaVariantcallingTest extends TestNGSuite with Matchers {
 
 object ShivaVariantcallingTest {
   val outputDir = Files.createTempDir()
+  new File(outputDir, "input").mkdirs()
+  def inputTouch(name: String): File = {
+    val file = new File(outputDir, "input" + File.separator + name).getAbsoluteFile
+    Files.touch(file)
+    file
+  }
 
   private def copyFile(name: String): Unit = {
     val is = getClass.getResourceAsStream("/" + name)
diff --git a/public/toucan/src/main/scala/nl/lumc/sasc/biopet/pipelines/toucan/Toucan.scala b/public/toucan/src/main/scala/nl/lumc/sasc/biopet/pipelines/toucan/Toucan.scala
index 606853f933f6cd1263a0f44193e5ae0e615812df..7c3cc327858be60bb3d299e550c0f4244b656560 100644
--- a/public/toucan/src/main/scala/nl/lumc/sasc/biopet/pipelines/toucan/Toucan.scala
+++ b/public/toucan/src/main/scala/nl/lumc/sasc/biopet/pipelines/toucan/Toucan.scala
@@ -35,6 +35,7 @@ class Toucan(val root: Configurable) extends QScript with BiopetQScript with Sum
   var inputVCF: File = _
 
   def init(): Unit = {
+    inputFiles :+= new InputFile(inputVCF)
   }
 
   override def defaults = ConfigUtils.mergeMaps(Map(