Diagnosis
cProjects uses integration with SAP Document Management (SAP DMS).
Error messages were generated when saving after inserting the documentlink "&SYST-MSGV4&" of the cProjects element "&SYST-MSGV1& -Syst-msgv2" in the document structure of the document info record "
Syst-msgv3".

Procedure
The log is available in DMS via transaction SLG1 "Analyze ApplicationLog".