Error 200279 in exe not in LV8.5

Question

I have a program that I have installed to a computer as a stand alone application.  When I run the stand alone application the buffer is filling up in about 5 seconds and I get error 200279.  When I run it in the LV8.5 environment with the same hardware, the available samples per channel never goes above 10.
I have tried playing with the rates and samples with no luck.  I have tried rebooting.  Both computers are running fresh versions of DaqMx8.6.
The computer with the exe is newer than my laptop which I developed the code on.  It also has run applications before with the same hardware with no issues.
Any ideas?

Answer 1

Hello,
Are you specifying a fixed number of Samples to Read or using the read all available samples with the DAQmx Read.vi?  You stated you played with the rate and the samples.  Does this mean that you changing the Sample Rate and Samples per Channel on the DAQmx Timing.vi?
Since you stated that the samples available to read is always 10 on the development machine, I would assume this is reflective of your buffer size set by the Sample Rate and Samples per Channel on the DAQmx Timing.vi.  It could be that you are pulling too slowly from your buffer with the Read function and the buffer is set to a size around 10.  Thus, you don’t see the value increase over time past 10 but it’s still overwriting.
Another option to look into is if there is anything else in your program that is prolonging the time in-between the Start Task and Read functions.  This could be solved by using the error outputs to control the flow of the program.  To learn more about dataflow in LabVIEW, refer to the LabView Help.  Try to make sure that the last function executed prior to entering the loop that contains the Read function is the Start Task function.  You can run highlight execution also to help further troubleshoot.
Samantha
National Instruments
Applications Engineer