diff --git a/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/jython/v2/ImagingDataSetRegistrationTransaction.java b/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/jython/v2/ImagingDataSetRegistrationTransaction.java
index 21ce8bcc8c1b2943a7a9d1bdf0f938741964de83..c2098918457a6377bc4d1216786482217445380b 100644
--- a/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/jython/v2/ImagingDataSetRegistrationTransaction.java
+++ b/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/jython/v2/ImagingDataSetRegistrationTransaction.java
@@ -643,7 +643,7 @@ public class ImagingDataSetRegistrationTransaction extends DataSetRegistrationTr
             ThumbnailsStorageFormat thumbnailsStorageFormat)
     {
         String thumbnailsDatasetTypeCode = findThumbnailsDatasetTypeCode(imageDataSetInformation);
-        IDataSet thumbnailDataset = createNewDataSet(thumbnailsDatasetTypeCode, "PHYSICAL");
+        IDataSet thumbnailDataset = createNewDataSet(thumbnailsDatasetTypeCode,  DataSetKind.PHYSICAL);
         thumbnailDataset.setFileFormatType(thumbnailsStorageFormat.getFileFormat()
                 .getOpenBISFileType());
         thumbnailDataset.setMeasuredData(false);