Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Fri, 23 Jan 2009 16:43:52 -0500

On 1/23/09 4:02 PM, Mark Rivers wrote:
> Folks,
> 
> Andrew pointed out to me today that recent versions of medm have a
> "Retry connections" button that one can access by right-clicking on a
> running display.  That sounded like a good workaround for getting medm
> displays back up.
> 
> I just tried that.  2 minutes after rebooting an IOC, some widgets on
> the medm window are still disconnected, while some are connected.
> Performing "Retry connections" did not help, the channels remain
> disconnected.  This is medm 3.1.2.1 built with 3.14.9 on Windows.

I didn't know about the "Retry Connections" menu item.  I just tried it,
and it doesn't seem to work for me either.  I clicked it but nothing
seems to happen.  I'm using MEDM 3.1.3, EPICS 3.14.10, on Mac OS X 10.5.6.

I looked at the function with signature "void retryConnections(void)" in
[MEDM-3.1.3]/medm/medmCA.c that gets called when one clicks on this menu
item.  It doesn't attempt to reconnect all disconnected PVs; it just
tries to find one disconnected PV and reconnect just that one.  The
source code comment says, "Find an unconnected PV and attempt to connect
to it.  That should restart the searches for all other unresolved PVs."
 Maybe the second sentence is not true with the current CA design?

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System