diff --git a/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/exporter/ExportExecutor.java b/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/exporter/ExportExecutor.java
index 3567a1d7bd1efd4fbaa75ad53fd994239f809786..d53eb8230347ec4977a6c5ed77c3c39d5d93b99e 100644
--- a/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/exporter/ExportExecutor.java
+++ b/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/exporter/ExportExecutor.java
@@ -1486,6 +1486,9 @@ public class ExportExecutor implements IExportExecutor
                     {
                         currentSection = propertyAssignment.getSection();
                         documentBuilder.addHeader(currentSection != null ? currentSection : "", 3);
+                    } else
+                    {
+                        System.out.printf("Skipping property assignment: %s. Current section: %s.%n", propertyAssignment, currentSection);
                     }
 
                     final PropertyType propertyType = propertyAssignment.getPropertyType();