Fatal error "thread.cpp", line 2863 in an App (LV 7.0)

[JochenAbke]

We have an Application which works for several years without Problems.
Since some weeks we get fatal error "thread.cpp", line 2863 for several times.
What can I do ?

(LV7.0 Runime + VISA) on Windows 2000

[Jochen]

According to our Corrective Action Request (CAR) database this error is related to a timing issue between vi-server and queue operations. Depending on the processor speed of the PC and other processes running in parallel this error may or may not occurr. So in your case there is a chance that a little change to the PC's software configuration (e. g. new version of virus scanner) could result in this error.

This issue was fixed in LabVIEW 7.1 so I would recommend to upgrade at least to LV 7.1.1.

Best regards

Jochen Klier
National Instruments Germany

[JochenAbke]

>This issue was fixed in LabVIEW 7.1

So it is a bug.

> so I would recommend to upgrade at least to LV 7.1.1.

No NI, that too easy. We should pay for an upgrade what "only" fixes a bug in the LabVIEW runtine ???

This application is part of a big commercial measurement software with more than 50 installations.

We need more information about this bug and how to avoid it.

Jochen Abke
abke@jabis.de

[Jochen]

Sorry for the late response but I was out of office.
The bug that I was referring to can't be reproduced with a trivial vi. In fact it should only occurr if you dequeue elements from a queue in a dynamically called vi (queue reference passed by Ctrl Val.Set method) and if this vi is stopped while the calling vi is still writing to the queue.

Do you use something like that in your application?

[JochenAbke]

Yes, indeed. We are using queues and VI server technologie in combination.
There are 30-40 PC out there with the very same software and only one station had these problem since some weeks.

- Jochen Abke -