minus values in BOM

Hi All!

Have a problem, to be resolved!

I am during SAP PP set up for a new business. I need to manage mandrels availability in planning. My idea was to, create an item index for mandrels, then add mandrel in first routing step, and then release (add with minus) in last routing step.

I can add minus BOM value, but during confirming production steps, there are errors, and the solution does not work. Item was added to BOM with L indicator, because I want to see how it looks in md04, and I want SAP to check availability of mandrel in planned time.

Maybe U can help me, how to resolve problem!

Thanks in advance!