MEI1 does not work for open POs created when the "Doc. Index" indicator in the vendor master was not ticked
We are live in Production for the past few months. We have recently changed a long list of PIRs via LSMW. I have read countless forums and have made sure all the necessarily configurations is in place (include in the Doc. Index checkbox in the vendor master) to update existing purchase orders via MEI1. I am running MEI4 prior to running MEI1 as well.
However, when I run MEI1 it only lists purchase orders created after this "Doc. Index" check box was ticked in the vendor master. Anything prior to this change isn't included in the work list. Of course, we have over a 100 open POs that have been created in the past few months that also need to be updated. How can I go about updating those?
Am I missing something or is there no way to achieve what I'm trying to do?