CRM_STATUS_CHANGE_EXTERN_OW not update status but set sy-subrc = 0

Hi Experts,

I am updating status using FM CRM_STATUS_CHANGE_EXTERN_OW  ,

CRM_STATUS_SAVE_OW and commit work.

Problem is if the status is not update the FM CRM_STATUS_CHANGE_EXTERN_OW returning sy-subrc = 0. Technically it should return non zero.

is there any setting or customising need to done.

Please suggest.

Thank,

rajan