diff --git a/Service/ServiceImplementations/GkvAccountingServiceImp.cs b/Service/ServiceImplementations/GkvAccountingServiceImp.cs
index 8b26c1bbd..94d8feea9 100644
--- a/Service/ServiceImplementations/GkvAccountingServiceImp.cs
+++ b/Service/ServiceImplementations/GkvAccountingServiceImp.cs
@@ -534,7 +534,7 @@ namespace BeWo.Service.ServiceImplementations
 			var response_app8 = SendApp8Request<GkvServerSendNewRequestDC, GkvServerSendNewResponseDC>(request_app8);
 
 			if (!response_app8.Success)
-				throw new GkvException(response_app8.Message);
+				throw new GkvException("app8: " + response_app8.Message);
 
 			return response_app8;
 		}