DAQmx & LabWindowsCVI : unknown error code

[Pablo.D]

Hi,

I am currently triyng to migrate an old test bench (which is working with Legacy DAQ) to DAQmx.

I have the following cards : 

• Chassis : Pxie 1073
• PXIe 6341
• PXIe 6722

Our test bench is a simulator, developped with LabWindowsCVI 2012.

When I tried to initialize and configure the cards (with DAQmxCreateDIChan or DAQmxCreateDOChan for example), I have strange error code that CVI and the DAQmxGetErrorString() function does not know : 

• -3480
• -3944
• -3870
• -3869

Where can I find the meaning of these error codes ?

For example, when I try to initialize the PXIe 6341 card, the task creation (thanks to DAQmxCreateTask) seems to be okay (the return code is 0). Right after this step, I try to instanciate a digital input on this card ("cardname/port0/line0") and the return code of the DAQmxCreateDIChan is -3944.

Are you familiar with this error code ?

Thanks in advance,

Best regards,

Pablo

[RobertoBozzolo]

I cannot recognize any of these codes: DAQmx error codes are normally larger in value. Are those values returned from DAQmx functions? Can you post the code pointing out where the errors arise?

Also, can you try creating a virtual channel in MAX on the same channel and see what happens?

[Pablo.D]

Thanks for your reply !

I can't reconize that error codes either, I tried to look for it on the internet, without any success.

The line of code which returns this error code is the following : 

DAQmxCreateDIChan(gs_6341TaskHandler, "cDAQ1-Mod2/port0/line0", "cDAQ1-Mod2/port0/line0", DAQmx_Val_ChanPerLine);

Of course, the PXIe-6341 has been renamed to ""cDAQ1-Mod2" in MAX.

I also tried the input/outputs of my card with the test panel and by creating a virtual task in MAX, everything seem to be ok, the read and the generated voltages are correct.

Thanks in advance.

Pablo

[Pablo.D]

I finally found the reason of this strange behavior : 

• for the DI/DO creation, I put as a virtual name the same name as the physical name ;
• for the task creation, I had two task with the same name ;

However I did not find in the DAQmx API documentation any information about these two points ...

It still does not explain why an unregistered error code is returned by the functions... Is someone have more information about this last point.

Regards,

Pablo