Labview 7.1 and Dual Core Processors

Hi,
I was wondering if anyone has encountered any problems using Labview
7.1 and the newer dual-core processors. I have a Dell Dimension DXPO51,
2.8 GHz Pentium D with 1 GB ram. There is NO virus software or any
other non-essential programs running in the background. The computer is
totally dedicated to controlling a machine.
Other NI boards installed: PCI-6221 for analog inputs, PCI-6602 for
reading encoders, PCI-7352 Motion Control board to control 2 motors.
The problem:
Periodically when I start my program, it locks up and I get the "Tell
Microsoft about this problem..." screen. After it exits out of Labview
and I restart, the Run arrow is not broken but the program will not run
until I make a change on the block diagram. Then I can run again.
Doesn't happen all the time, doesn't happen after running after a
certain amount of time, doesn't happen after a particular change is
made (i.e. adding case statements, adding an event, etc.). In other
words, totally random.
I have tried totally uninstalling ALL National Instruments software,
including cleaning the registry, and re-installing everything. Didn't
help.
The machine will be shipping with the executable file only but I'm still leary of problems arising due to this issue.
Any help or suggestions of things to try would be appreciated.
Thanks,
Teri

Hi Teri,
I've seen scattered reports of users having trouble with dual-processor
machines with earlier versions of LabVIEW, though I'm not aware of
verified solutions in those cases. The dual-processor operation
should be completely transparent to LabVIEW, although I know XP has had
some difficulties in providing the abstraction correctly. A
workaround that has been successful in the past is to set the processor
affinity for LabVIEW to a single processor. This should eliminate
the dual-processor nature of the system from consideration. If
the problem still recurs after that, then the issue stems from another
source and we can investigate further. Does it show this behavior
with any program (or just by opening the LabVIEW environment)?
How often does this occur (10%, 50% of the time)?
Cheers,
Matt Pollock
National Instruments

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