PO approval workflow is failing with the error --Failed Activit: Get PO Attributes -- Error Stack : Wf_Engine_Util.Function_Call(PO_POAPPROVAL_INIT1.GET_PO_ATTRIBUTES, POAPPRV, 562566-638453, 265219, RUN)

Issue:    PO approval workflow is failing with the error

Failed Activity		Get PO Attributes
Activity Type		Function
Error Name		-6512
Error Message		ORA-06512: at line
Error Stack		Wf_Engine_Util.Function_Call(PO_POAPPROVAL_INIT1.GET_PO_ATTRIBUTES, POAPPRV, 562566-638453, 265219, RUN)

Solution: There might be multiple reasons. Below would be one of the issues.

The PO distribution line id is having quantity ordered ‘0’ and it is causing the issue.

I found one Metalink id Purchase Agreement Fails Under GET_PO_ATTRIBUTES Activity (Doc ID 460332.1)

After performing the below data fix. It resolved my issue.

Delete from po_distributions_all

where po_header_id = '562566'

and po_line_id=565160

and req_distribution_id=219153