diff --git a/datastore_server/source/java/ch/systemsx/cisd/etlserver/SampleRegisteringDropbox.java b/datastore_server/source/java/ch/systemsx/cisd/etlserver/SampleRegisteringDropbox.java
index 87275a24ce61703d42cc57972653ce5e0d17eecb..d1b1b8a3e4f41a669a3fd62dfa62f7979113e79b 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/etlserver/SampleRegisteringDropbox.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/etlserver/SampleRegisteringDropbox.java
@@ -108,7 +108,7 @@ public class SampleRegisteringDropbox implements IDataSetHandler
             NamedInputStream stream =
                     new NamedInputStream(new FileInputStream(file), file.getName());
             BatchSamplesOperation info =
-                    SampleUploadSectionsParser.prepareSamples(sampleType, Arrays.asList(stream),
+                    SampleUploadSectionsParser.prepareSamples(sampleType, null, null, Arrays.asList(stream),
                             defaultSpaceIdentifierOrNull, sampleCodeGeneratorOrNull, true, null,
                             BatchOperationKind.REGISTRATION);
             logSamplesExtracted(file, info);