FLD768 THE CTLSEGNM PARAMETER CANNOT BE SPECIFIED ON THE DFSMAP STATEMENT FOR A LOGICAL DB.

Explanation
The CTLSEGNM parameter is not allowed for logical databases.

System action
The DBD generation attempt fails with an MNOTE of 8.

Programmer response
Remove the CTLSEGNM parameter from the DFSMAP statement and rerun DBDGEN.