Service SRM PO fail to replicate to SAP with error"Tax code Mand. for ERS"

HI

We are facing issue for posting Serviice PO with vendor enabled with ERS functionality.

Service purchase orders with ERS flag and with complete tax detail fail to replicate to MM PO. Error found on XML on ECC interface : "Enter Tax code in case of Evaluated receipt settlement".

We have compelete tax details on the XML which is not recognized. When we manually feed the details in dubug it allows to post the document.

PO is created with account assigned service item.

Have any one come across simialr situation.

Regards

Prashanth K Saralaya