--- a/docs/data_processing/pre_exit_codes.rst	Tue Mar 25 09:07:49 2014 +0200
+++ b/docs/data_processing/pre_exit_codes.rst	Tue Mar 25 09:16:06 2014 +0200
@@ -146,7 +146,8 @@
    Unknown product type
 
 77
-   Found error(s) in SCC_DB for the submitted Measurement_ID
+   Found error(s) in SCC_DB for the submitted Measurement_ID. This could occur,
+   for example, if the used system does not have any product associated with.
 
 78
    Failed in quering SCC_DB