UsbSession read error

[afl3]

I'm currently using the measurement studio package in visual basic 2008, I am trying to communicate with a USB instrument with the following code:

 Public CurrentSession As New NationalInstruments.VisaNS.UsbSession("USB0::0x0957::0x3018::MY48000107::INSTR")

CurrentSession.Write("*IDN?\n")

sleep(100)

buffervar = CurrentSession.ReadString(1024)

This seems to just return a read error. I have also tried using Query, same result.  The instruement communicates just fine in the MAX, so I'm at a bit of a loss as to why this code doesn't work. Any help would be appreciated, thanks.

-Andrew

[Scott-M]

Hi afl3,

I would try getting a spy capture of both the communication in Measurement and Automation Explorer, and with your program, hopefully comparing the 2 will help you find out what's going wrong.

Performing a Good NI Spy Capture for Debugging/Troubleshooting

Scott M