Buffering problem in D/A conversion??

i am trying to modulate fsk and send it to the daq card(keithly kusb 3116) using LV Link 3 vi. i have posted its vi which i have made and the error which comes. which states "requested operation requires that valid samples in buffer be a multiple of 2" . plz help me with this problem. i have tried to use my daq card with VISA too. but i was only able to find very little help from tutorials and examples. sir, plz download these LV Link 3 vi too, so that my attatched vi works, and definitely it will ask for the open layer board too. plz help me as i am in my final semester of engineering and really stuck with this. thanx
nauman
Attachments:
tx 5 with mod.vi ‏46 KB
error.png ‏45 KB

Hi nauman2558,
The error you are receiving isn't a LabVIEW error. It is a custom error that was programmed by the designer of the driver, Data Translation. You may be able to contact them for more information about what to do to get rid of this error.
Here is a helpful tutorial for communicating with a 3rd party USB device using VISA calls. Here is a general Instrument Control Tutorial.
Good luck!
Regards,
Jared R.
Precision DC Product Support Engineer
National Instruments

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