PR BANF Change Document

I have an issue with the purchase requisition workflow (header level) . The user creating the Purchase requisition and HOLD it for futher changes . Now there are two things I need to discuss.

The workflow should not be triggered if it is in HELD state.But currently for me the workflow is getting triggered.So for this I created an additional step in which I check that the workflow is ON HOLD or not .If it is on HOLD than complete the workflow.

Therefore,I need to re-trigger the workflow when the user made the changes and chooses the SAVE button.For this I have used BANF change document and in the field restriction I have selected MEMORY field of EBAN in old 'X' and new 'space' and the event I choose is RELEASESTEPCREATED.

Now the workflow is triggering but with the error. I check the container the Release Code field is empty .Now I need to know how to overcome this problem how to pass the release code to the workflow container.