Re: [spr10288] Dead Ports

• To: breckle@fzi.de
• Subject: Re: [spr10288] Dead Ports
• From: Colin Meldrum <colin@franz.com>
• Date: Tue, 15 Feb 94 09:32:31 PST
• Bh: append spr10288 customer
• Bh-Id: spr10288
• Cc: bugs@franz.com, clim@BBN.COM
• Class: bh

Your problem report has been assigned a tracking id of spr10288.
Please use this id in the subject line of any mail related to
it so that we may better track communication on your inquiry.
Also, please address mail to bugs@franz.com as well as me,
so your questions can be answered if I am unavailable.

  Date: Tue, 15 Feb 1994 17:19:26 +0100
  From: Hans Breckle <breckle@fzi.de>

  CLIM2.0beta2
  Allegro4.2

  I have a problem with ports: I keep getting the error message

  The port is not alive

  Restart actions (select using :continue):
   0: retry assertion.
   1: Return to Traffic command level
   2: Traffic top level
   3: Exit Traffic
  [Current process: traffic]

This error message occurs either when a port has a null process or
when the port itself is null. Unfortunately without a backtrace I
cannot tell which case is occurring here.

  What I am doing is switching between applications on
  different screens, and I would like to know what
  causes a port to 'die'? I know that I can do
  (restart-port port), but where should I put the
  statement in the code?

You shouldn't need to do this.

  I do not have a failing test case, since a simple
  example I wrote worked perfectly. So probably the
  best approach is now to figure out what can cause
  a port to die.

If you could send an example that would help a lot. Otherwise please
send a complete backtrace with :zoom :all t

-----
Colin Meldrum, Franz Inc.	1995 University Avenue, Suite 275         
colin@Franz.COM (internet)	Berkeley, CA 94704                       
uunet!franz!colin (uucp)	Phone: (510) 548-3600; FAX: (510) 548-8253

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