A return code 94(100) is generated when a navigational application triggers an SQL procedure and that procedure receives an error.
If the program is inserting rows into another table it could be failing with a return code 07 or 08. Or maybe that other table is inaccessible. There can be many reasons, you need to examine the actual return codes produced by the trigger itself which may be found in the Request Area in the dump either in the PXX or the PXXMLnn SYSOUT.
If the dump has been suppressed, you can use the RCERROR YES,NO,94100 console command to produce the dump.
In the dump search for the DBRW---n (where n is the task number that appears in the dump header for the RC 94(100)). Then look at the user request area starting at offset x'100' then the DBRQDIAG area located at offset x'1C' into the user request area. It contains the following:
2-byte external return code
1-byte internal return code