IBA Automatically changes to null on Revise

Hi,

I have a urgent issue with my EPM Document Workflow. I am creating a EPM Document from PRO-E and check-in to a product container which has an IBA "DDApplicable" = True, since it was created. The EPM Document is supposed to have the attribute same once it is created.

Once I revise this EPM document, the IBA "DDApplicable" shows null, which was true before revise.

Amy fixes?

Regards

Ishaan Nayyar