BUPA_REL -BDoc validation error

Hi All, We are replicating the account from ECC to CRM . If any contact persons(BUPA_REL) are there in account , It is giving validation error in SMW01.

Relationship Between Partner XXXXXXXX and XXXXXXX Does Not Exist.

BP relation ship is not flowing from ECC to CRM . Don't know what I am missing in the configuration . When ever I get this error I am using the synchronization for BUPA_REL and replicating .

I checked SAP notes, but I didn't found proper note for this issue. I followed below link also.

https://archive.sap.com/discussions/thread/3736056

Regards,ram