1887476 - spool work process stopped with semaphore 31

• In trasaction SM50, you can see one spool work process has the status "stopped", reason "CPIC",semaphore 31.
• The following errors are recorded in the spool work process:

          *** ERROR => MtxLock failed (step 1, th_errno 10, action 1, level 2)
          ***LOG R0H=> ThIErrHandle, Loop in ThErrHandle, restart wp ()
          ERROR => RFC-GUI: ThSendAndWait in read returned
          *** ERROR => RFC Error RFCIO_ERROR_SYSERROR

• SAPGUI 720

signal 11;semaphore 43,31;Spool work process hang; , KBA , frontend printing , semaphore 31 , rfcio_error_syserror , thsendandwait in read returned , BC-CCM-PRN-SPO , Spool System , Problem