Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Wed, 1 Jul 2009 08:04:19 -0500

David,

The medm message is "normal" because your IOC is exiting for some reason.  You need to find the reason for that.  It's strange that the IOC exits with no message, so it may be a bit difficult to track down.  It have not seen that.  Some systems are set up with an inactivity timer that will log you out after some period of inactivity, but that should kill your ssh session, not just the IOC application.

mark

-----Original Message-----
From: [email protected] on behalf of David Kline
Sent: Wed 7/1/2009 8:02 AM
To: Tech-talk
Subject: medmCAExceptionHandlerCb: Channel Access Exception message

hello,

i'm running epics on a linux softioc and get the below error message 
after the
ioc sits for a while. the application was built with epics base 
3.14.18.2 and
with the following synapps modules/versions (if it matters):

autosave - 4-2-1
asyn - 4-9
calc - 2-6-3
motor - 6-4-2
seq - 2-0-11
sscan - 2-5-6
std - 2-6

-----------------------------------------------------------------------------------------
medmCAExceptionHandlerCb: Channel Access Exception:
  Channel Name: Unavailable
  Native Type: Unavailable
  Native Count: 0
  Access: Unavailable
  IOC: Unavailable
  Message: Virtual circuit disconnect
  Context: ioc26idbpol.cnm.aps.anl.gov:5064 
<http://ioc26idbpol.cnm.aps.anl.gov:5064>
  Requested Type: TYPENOTCONN
  Requested Count: 0
  Source File: ../cac.cpp
  Line number: 1142
-----------------------------------------------------------------------------------------

basically, i ssh into the machine through exceed and launch the medm 
screens as well
as the ioc (interactively). if i just let it sit, then after a few hours 
(i've seen it fail
after ~2hrs and sometimes after 5hrs) the ioc returns to the linux shell 
prompt (bash)
and the above message appears (no other messages).

has anyone seen something similar, know the cause, and resolution? ideas?
any help is appreciated.

please advise,thanks in advance,
/david

-- 

+-------------------------------------------------+
David M. Kline                   [email protected]
Beamline Controls and Data Acquisition (BCDA)
Argonne National Laboratory, Advanced Photon Source
Argonne IL, 60439                      630.252.8639
  ---------------------------------------------
          Beamlines R Us -- EBRICKs Rule
+-------------------------------------------------+ 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System