QM01 QM02 need to determine partner after batch filled in on equiment tab

I am looking at Quality notifications and I want to determin a payer when the batch field has been filled onn the quipement tab. I have found 2 exits: one for partner determination ( EXIT_SAPLIQS0_006 ) and one for saving information on saving EXIT_SAPMIWO0_020 )

The problem I have is that the partner determination exit is invoked before I have a chance to enter a batch number on the equipment tab. However, when pressing save, user exit EXIT_SAPMIWO0_020 has no reference to the partner information to be able to change the partner after I have filled the batch.

How do I change the partner information after I have entered the batch on save when the partner determination is not called upon save?

Has anyone else come across this dilemma?

Many thanks

Larissa Maryniuk