Re:
> Can anyone tell me what CONTROL BLOCK WAIT means?

Basically, someone is trying to procure (obtain) a lock
that is already locked.  MPE/iX relies heavily on
a data structure called variously a semaphore or control
block.

<plug>
SHOT, from Lund Performance Solutions, can show you what process owns a
lock that another process is waiting on:

:shot
SHOT: adm +waitsempin
SHOT: all
? PIN  CPU   Process Name            Pri Q Delta  %  Ic  sPIN Wait State
- --- ------ ----------------------- --- - ----- --- -- ----- ----------------
    1 s   13 PROGEN.PUB.SYS           13 A           Nn       PROGEN_GLOBAL_PORT
...
  110    341 JSMAIN.PUB.SYS          152 B           Nn       MsgPort#-32803
  111     33 AIFUTIL.PUB.SIELER      152 C           Nn   127 LONG: CNTL_BLOCK_WAIT
  112    321 CI.PUB.SYS              152 C           Nn       TERMINAL_READ_WAIT

In the above, we see that pin 111 is waiting on a control block owned by process
127.
</plug>





Stan Sieler                                           [log in to unmask]
www.allegro.com/sieler/wanted/index.html          www.allegro.com/sieler