Project supplier Invoice matched to PO not getting interfaced to project

Hello,

Application version 12.1.3

I am using Service Procurement to create requisition for contract labor. Project number and task number mentioned in the requisition.

I created PO out of it.

Placed the contract labor in HR , contingent worker is assigned to PO.

Created timecard with PO based layout.

Approved timecard.

Ran the retrieve OTL timecard in purchasing, it has created the receipt in purchasing and also the modified extention has created the supplier invoice automatcally for it.

Validated and accounted the Supplier invoice in AP.

Ram PRC : Interface supplier cost.

(Implementation option - Interface contingent worker timecard with PO integration is unchecked.)