Hi Dave
Here is what I found out. Table /SAPSLL/OBJSSF gets populated only when the documents are released in GTS. When program /SAPSLL/OBJSSF_MAINTAIN_RFC_R3 it picks up the PO from the table, opens it in transaction ME22 - puts (.) in the Short text (MAKT-MAKTX) field of the line item, removes it and saves the document. This triggers the follow on function - output print etc.
However, the issue is MAKT-MAKTX is copied from the material master and is greyed out.
The program fails to trigger the follow-on function.
Thanks - Arvind