Call (Perform) to a non-existent routine - Error in table Maintenence Generator

I created a Table Maintenence generator. All events and Function group are activated and no error is present. But when I try to make changes in the table and save in SM30, it gives a short dump. the short dump is :

"Call (perform) t a non-existent routine

The current program "SAPLZEMP" had to be terminated because it has come across that unfortunately that cannot be executed.

or

Error in SAP kernel.

the current SAPLZMP_FG program had to be terminated because the abap processor detected an internal system error."