How to do Mass changes for IBP's via LSMW

Hi Everyone,

My business requirement is to do mass changes for city and region field @IBP

I tried to do mass change for IBP via T code mass and field name BUS_MASS_BUT0ID-REGION

After successfully updating 633 records, I checked BUT0ID table level, it is updating properly  & same not showing in T-code “BP”.

I tried to do LSMW for the same and its not working fine.

can any one explain how to do LSMW for Internal business partner.

Thanks and Regards,

Charan Kumar