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10-07-2015 03:47 AM
10-07-2015 03:47 AM
%LIB-F-INSEF, insufficient event flags
Hi all,
From one machine I create terminal screen on others by creating a new window (Decwindows) by the DCL-command
$ crea/term set host xxx
I can do that several time until a certain moment when I get
%LIB-F-INSEF, insufficient event flags
and no window is creating.
However each time I delete another window I can replace it with a new one.
Obviously I run into some sort of quota limit. Is there a way to raise the allowed number of event flags?
Regards
Jouk
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10-07-2015 06:16 AM
10-07-2015 06:16 AM
Re: %LIB-F-INSEF, insufficient event flags
There's no quota for event flags.
You probably need to start a new DECterm controller.
Unfortunately and FWIW, event flags have inherent problems, and applications using them for non-trivial tasks don't scale at all well. Event flags are a primitive and problematic mechanism on OpenVMS, and one that is usually best avoided, for all but the most trivial cases. Even for some of the trivial cases, using the "don't care" event flag EFN$C_ENF can be a better approach.
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10-07-2015 08:32 PM
10-07-2015 08:32 PM
Re: %LIB-F-INSEF, insufficient event flags
Jouk,
Somewhere around I have a procedure which automatically starts a new DECterm controller as a detached process when required. I'll see if I can find it...
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10-07-2015 11:38 PM
10-07-2015 11:38 PM
Re: %LIB-F-INSEF, insufficient event flags
Hoff : thanks for pointing me to the documentation. That solves the problem
John : Yes an automatic procedure would be nice.
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10-08-2015 08:34 AM
10-08-2015 08:34 AM
Re: %LIB-F-INSEF, insufficient event flags
Another option is to use DECnet task-to-task (insecure) or ssh (secure) to launch an X terminal session (DECterm or otherwise) on the remote host, and to then aim the output of that session back to the X Windows server on this box for display.
Variations on this theme:
http://labs.hoffmanlabs.com/node/1524
http://h71000.www7.hp.com/wizard/wiz_5409.html
https://groups.google.com/d/msg/comp.os.vms/n8GIpiDHGc8/OBXWmFi2BS4J
etc.
Current OpenVMS ssh does support the execution of user-specified one-shot commands on the remote host, too.
ssh can also set up the remote display path, using -Y or similar.
Variations:
http://labs.hoffmanlabs.com/node/134