Updating Partner function of Service Order in WFM Badi

Hi Experts,

             I am trying to update plant( as vendor ) partner function of service order in CRM_SRV_SDL badi implementation in WFM Scenario,but it is giving an error that "Error in updating object ORDER" on commit. CRM_ORDER_MAINTAIN  and ORDER_SAVE are coming as subrc = 0. when I try to update the same partner function in an individual report it is updating properly. and if i try to update the other partner functions those are updating properly.

  attaching the error image.

any help would appreciated.

thanks

narasimha