Conference atlant::terminals

3246.0. "Curious VT520 Wait State PRoblem,help required please" by SEDTMA::HANCOCK (Use what you (used to) sell) Tue Feb 04 1997 10:51

	Hi,
		can anyone advise me on how to go about troubleshooting
	this little scenario.

	VT520 terminals connected to DECservers,700 and 900. Users log in
	multiple times to several systems,using multisessions.One particular
	application (a DECforms application) gives a problem whereby,if the
	screen is refreshing,and the user flicks forward a session whilst
	the screen is updating,when they come back to that session ,the 
	VT520 goes into a wait state,and cannot be released.They either have
	to power the thing right off,or go back to the good session,log it 
	out,and flip back to the "hung" session and ^R it to bring it back
	to life.

	Any ideas where the problem might lie,or where to start looking ?

	VMS is at 6.2,Servers are at current shipping images..

	Cross Posted in TERMINALS,TERMINAL_SERVERS,LAT,and DECFORMS

					Cheers Mick Hancock  MCS South UK

    I had what sounds like the same problem with DECserver multisessions
    all the way through beta testing and into the final releases of the
    VT520/525. [VT525 QAR 145, if anyone feels like looking it up.] My
    usual procedure for reproducing it was to log in quickly to all four
    sessions on the terminal but it would happen when multiple sessions
    were trying to update the screen at once, too. I ended up switching
    back to VMS SSU for multisessions because of this bug. A ^T would
    almost always reset the session (less drastically) in this situation. 
    
    The resolution I got from the product team at the time was that it was
    a bug in the DECserver multisession implementation that had been
    demonstrated to "the DECserver people". Don't know if it ever got fixed
    and most of the people involved are now gone....