error 7221 description from BOL
Could not relay results of procedure '%.*ls' from remote server '%.*ls'.

Yes , I execute my procedure on server A while it located on B(linked server) .
Procedure does restore log file with standby on B and runs every 15 min ,BUT !!! I am getting this error once twice a week !!!.

I am runnning DTS transfering login from A to B linked) server every 1 hr, could it be the problem ?