Error coming in FM CATS_EXTERNAL_WORKLIST when using from Gateway

Hi ,

In my time sheet service , we are using an exit EXIT_SAPLCATS_006 , where above given FM is used to get the worklist .We are passing parameters variant , pernr and workdate to it .

Now there are two cases here .

1. If we use this exit and fill the timesheet from CAT2 transaction (not from our Gateway service) , then this FM is not giving any error with the parameters given above .

2. But when this exit is called from our service then this FM is giving an error with the same parameters to FM . Error is : "No status object is available for WBS *************** "

Kindly help .

Thanks,

Sachin Sharma