Tracking tab not getting updated with newly created Back end Contract number in SRM

Hello Gurus,

We are creating Contract from Bid response directly to the Back end system. The contracts are created and 2 Idocs are generated with 53 status. The contracts are created through FM B46B_CTR_CREATE. However when the contols come back to SRM system, We are getting dump when updating the status in GET_AND_SAVE_XY_TABS. Please help me in resolving the issue.