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Conference bulova::decw_jan-89_to_nov-90

Title:DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:STAR::VATNE
Created:Mon Oct 30 1989
Last Modified:Mon Dec 31 1990
Last Successful Update:Fri Jun 06 1997
Number of topics:3726
Total number of notes:19516

2224.0. "Xmultiplex input error ?" by EWBV21::INAZU_K (It's a little bit funny) Wed Feb 07 1990 04:58

	Hello,

	I have a question.
	My customer says his application program sometimes ( but not always )
	aborts with the error

	Xtoolkit error Error in XMultiplex input
	%DWT-F-DWTABORT, ....

	He says he uses XT$APP_NEXT_EVENT and there may be some relation between
	this routine and error.

	But I don't know what causes the error, and how to avoid the abortion
	of the application.

	Will anyone give me some hints ?

	Thanks in advance,

				Kanako Inazu /TSC/CSC/CS/Japan
T.RTitleUserPersonal
Name		DateLines
2224.1Just a guess...LEOVAX::TREGGIARIWed Feb 07 1990 09:5619
>	He says he uses XT$APP_NEXT_EVENT and there may be some relation between
>	this routine and error.

There is definitely a relationship between XT$APP_NEXT_EVENT and the error.
XMulitplexInput is the internal Xlib routine that the toolkit calls to
wait for "input" (where "input" can be a X event, a timeout, or a source
of alternate input - depending upon what the application has asked for).
XMultiplexInput is called by the XtAppNextEvent routine which is called
by XT$APP_NEXT_EVENT.  The error the application is seeing is reported
when XMultiplexInput returns an error status to the toolkit.

Why would this happen?  It doesn't ever *normally* happen (i.e. it's
not a common error).  My only guess would be that something is
overwriting memory which holds the data that the toolkit sends to
XMultiplexInput.  The relevant data is the Application Context, the 
Xlib Display structure and any timeout or alternate input data structures.

Leo
2224.2EWBV21::INAZU_KIt's a little bit funnyMon Feb 12 1990 19:245
Re. < Note 2224.1 by LEOVAX::TREGGIARI >

	Thank you for your information.

					Kanako Inazu