diff --git a/Connectors.Common/Modules/slt/sltSync.vb b/Connectors.Common/Modules/slt/sltSync.vb
index 35d8113..c0a86c1 100644
--- a/Connectors.Common/Modules/slt/sltSync.vb
+++ b/Connectors.Common/Modules/slt/sltSync.vb
@@ -57,7 +57,7 @@ Namespace slt
                         Dim oFileName = oDocument.GetUniqueFilename()
 
                         If oFileName Is Nothing Then
-                            Throw New ApplicationException("Filename or extension could not be determined!")
+                            Throw New ApplicationException($"Filename or extension for ExDocId [{oDocId}] could not be determined!")
                         End If
 
                         Dim oFilePath = GetFinalFilePath(oFileName)