MB1B - fill MSEG-UMWRK / MSEGK-UMWRK

Dear All,

I'm using MB1B for transfer posting with 301 movement type. In this case I want to fill automatically the field MSEG-UMWRK (fcode=NL) / MSEGK-UMWRK (fcode-NP) with a specific value.

I created for this an enhancement in MM07MFZ0 include but the values I set here are cleared in MM07MFK0 (MM07MFK0_KONTIERUNG_INIT) and MM07MFP0 (MM07MFP0_POSITION_SETZEN).

Is there any enhancement point / badi / user exit triggered by MB1B in order to set the value for MSEG-UMWRK / MSEGK-UMWRK ?

Thanks for your help.

Best regards, Florina