EXIT_SAPLCOBT_001 - Production Order User Exit

We are using the above mentioned user exit at the time of production order saving.

1) If we are using error message like message e014(zk) then it is giving dump and no help provided in the dump.

2) Is there any method to go to the Production Order Component screen after warning / information message (customer message thru the exit).

Pl help

Regards

balakumar