Experimental Physics and
Industrial Control System

"Jeff Hill" <[email protected]> · Wed, 1 Aug 2001 11:31:21 -0600

Vladimir,

> 
> We are running DAQ application which queries portable CA server running on
> NT for several PV's.
> Everything worked well but today it crashed with the following massage:
> 
> A call to "assert (status == 0)" failed in ../iocinf.c line 1472.
> The file "core" will be created in the current working directory.
> Please save this file and the text of this message in order to assist
> in diagnosing this problem.
> Please contact the author of this software or else send the text of
> this message to "[email protected]"
> This problem occurred in "@(#)Version R3.13.4 $2000/12/15 15:52:33$"
> 
> Could someone advise us what may cause this crash?

There appears to be a problem with the following code that closes the socket 
when disconnecting from a server.

  	status = socket_close (piiu->sock_chan);
	assert (status == 0);

What OS was this _client_ running on? If on Windows, what OS version is in use?

There is another assert test that detects if the close is executed twice
and this situation was not detected first. Therefore, I am guessing that 
one of the following is the cause. 

o OS related problems with closing a valid socket
o the data structures employed by the CA client library have been corrupted
o CA client library object files are not all compiled with the same version of 
the header files. This might occur if the header files updated on windows and
a complete rebuild is not completed with "make rebuild" or "make clean" followed
by "make".

Is this problem easily reproducible? Is it intermittent?

Jeff

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System