diff --git a/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/AbstractHCSImageFileExtractor.java b/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/AbstractHCSImageFileExtractor.java
index 6fe0c991f485a78860483c1db6fa76c356ee9f2b..b2ed635b0c59f4191ff0b0b7079521c6ea408583 100644
--- a/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/AbstractHCSImageFileExtractor.java
+++ b/screening/source/java/ch/systemsx/cisd/openbis/dss/etl/AbstractHCSImageFileExtractor.java
@@ -139,7 +139,7 @@ abstract public class AbstractHCSImageFileExtractor implements IHCSImageFileExtr
             }
             final String sampleCode = tokens[tokens.length - 4];
             if (sampleCode != null
-                    && sampleCode.equals(dataSetInformation.getSampleCode()) == false)
+                    && sampleCode.equalsIgnoreCase(dataSetInformation.getSampleCode()) == false)
             {
                 if (operationLog.isDebugEnabled())
                 {