Supplying site/merchandise category

Hi Experts,

We need to assign supplying site per site merchandise category for atleast 40000 entries. The sites already exists.

We tried to load the data using DEBMAS.DEBMAS07, using segments E1KNA1M and E1WRF3M. Though it is successful, it is expecting whole data to be populated into IDoc, otherwise, the information such as Address, Control data, etc.. is wiped off.

We want only to assign supplying site per site merchandise category as we only have the data pertaining to it to upload.

Can you let us know how it can be achieved?

Thanks,
Suraj Pabbathi