pb with DAQmxCreateLinScale (error -200077)

[snicolay]

Hello,

I get error -200077 when calling to DAQmxStartTask. It seems to come from this line (LabWindows/CVI 7.1.1):

DAQmxCreateLinScale ("Vscale", 0.2, 0.0, DAQmx_Val_Volts, "V");

and when I replace 0.2 by a number greater than 1, I don't have any error. How can it be possible ??

Can anybody helps me ??

Thank you.

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For information, here is all the code (simplified), more complete source in attachment:

Init_DA_Brds(1, &sBoard);

DAQmxCreateTask ("SbyAcqTask0", &thSbyAcqTask);

DAQmxCreateLinScale ("Vscale", 0.2, 0.0, DAQmx_Val_Volts, "V");

DAQmxCreateAIVoltageChan (thSbyAcqTask, "dev1/ai0", "", DAQmx_Val_RSE, -5, 5, DAQmx_Val_FromCustomScale, "Vscale");

DAQmxStartTask(thSbyAcqTask);

[e-Cash-Money]

You can actually search the error code number on www.ni.com and see if there are any KnowledgeBase articles with information about the exact behavior you are experiencing.  I did a search for "200077" and found some relevant information.  After you click on the first result, there will be a link in the related links section called "Why Do I Get "Error 200077 Occurred at DAQ Assistant" When Saving a Task in the Measurement and Automation Explorer?".  My guess is that this is a similar issue to the one you described.

[snicolay]

I had already looked in the knowledge base, but I didn't see this one.

I'll try that. Thanks very much Eric.