Mystery Error -50103

OK, so I'm finally up to LV2009f3, doing some cDAQ work.
I'm adding code for devices, one at a time and checking them out.
(I'm using simulated chassis, and simulated devices - thank you, NI, for this capability!)
When I add the strain gage (NI-9237). I start getting an error (-50103 - resource is reserved).
MAX says the board works fine, and gives me the simulated sinewave.
I boil my code out of my program, and it works fine by itself.
But when I try to do BOTH module 4 (9201) and module 6 (9237), I get the error.
The attached snippet (I like snippets, BTW) shows the code.
Before I added the error wire to force the strain gage module to configure AFTER the voltage module, I would get the error every time.
But, sometimes it would occur on the VOLTAGE module, and sometimes on the STRAIN module.
I could run it several times, and the error would come from one or the other, but it would occur every time.
So what are the rules here? They are completely different modules, yet something is temporarily tied up when I try to configure them in parallel.
It's some sort of race, judging by the error happening on one or the other. One chain is claiming this "resource", and the other finds it busy and complains.
Yet the error is attributed to the START TASK vi.
What am I missing? What are the rules about this?
Steve Bird
Culverson Software - Elegant software that is a pleasure to use.
Culverson.com
Blog for (mostly LabVIEW) programmers: Tips And Tricks
Solved!
Go to Solution.
Attachments:
Error.PNG ‏30 KB
StrainSnippet.png ‏51 KB

More info:
IN the snippet I showed, running the things serially removed the problem.
In my real code, I do the CONFIG at one point, and the START at another.
IOW, in the CONFIG operation, I CREATE CHANNEL, set DAQ TIMING and set BUFFER SIZE for two modules, in parallel, getting two TASK IDs that I remember.
In the START operation, I START both tasks in parallel.
Forcing the CONFIGS to run sequentially does NOT fix the error.
Forcing the STARTS to run sequentially does NOT fix the error.
Forcing them both to run sequentially does NOT fix the error.
Even adding a 1-sec delay between STARTS does NOT fix the error.
IOW, it appears that I have to START one task before I can CONFIG the other, a state I don't understand.
Message Edited by CoastalMaineBird on 01-16-2010 10:02 AM
Message Edited by CoastalMaineBird on 01-16-2010 10:03 AM
Steve Bird
Culverson Software - Elegant software that is a pleasure to use.
Culverson.com
Blog for (mostly LabVIEW) programmers: Tips And Tricks
Attachments:
Config.PNG ‏29 KB
Start.PNG ‏16 KB

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