Fatal Internal Error

[Controls_Engineer]

I have a LabVIEW VI that has several sub-vis in it. The main VI runs a test 18-hr long. The has been ruunning fine for past two months. To day suddenly it popped-up the following message:

Fatal Internal Error:"memory.cpp",line 638 LabVIEW Version 7.1. You will lose any unsaved work. For assistance in resolving this problem, please relaunch labVIEW, or contact NI.

Operating System: Windows XP Professional.

Computer: Pentium (R) 4 CPU 2.8 GHz 496 MB RAM

What caused the problem? How can this problem be avoided?

Thank you.

[mikeporter]

First of all, has it done it just the one time? Sometimes "stuff" happens. On a very pragmatic level, if the error isn't repeatable, there's no real way to troubleshoot it...

If it is repeatable, how long does the prgram run before the error pops-up? Have you monitored the program's memory consumption in the task manager? Is it steady?

Mike...