Issues with controlling an Agilent function generator.

[Shantanu]

I made a simple VI (attached) to control an Agilent 33521A function generator.  If I turn on the function generator, connect the USB cable, and run the VI, everything works...  Once.  If I try to hit run after the VI has executed once, I get any number of error messages; one of them being a dialog box from Windows informing me that my USB connected hardware has malfunctioned.  I'm fairly certain that the generator isn't the problem, because rebooting everything fixes it...  I can only assume that my layout is wrong.  All of the error messages I get come from the initialize VI.  Any help would be much appreciated.

Labview 2012 SP1;

Latest error:

Code -1073807360

'VISA Clear in Agilent 3352X Series.lvlib:Initialize.vi->fgentester.vi'

[fromm8]

Hello Shantanu,

That behavior you describe sounds like an issue when we are closing the VISA reference. Let me link below a KB that talks about it:

VISA Error -1073807360 (system error) or Error -1073807302 when Stop Bits Set to 1.5

An additional question.. Are you using this driver? 

I do not see in that code how the visa reference is being closed, but you could review that part!

Regards

Frank R.