Getting 0x3fff007d error when opening VISA handle

[Puranik]

Hi,

I'm getting VISA error "0x3fff007d" when opening the VISA handle for the Tek digitzer 5032B. The command viOpenDefaultRM is successful. This digitizer is connected to the our Automated Test Station. The Controller machine is NT and latest NI software is installed. The other instrument ( Agilent CNTR 53131A) IVI session is opening properly. Pls let me know your inputs in solving this problem

Thanks

Prashantha

[Sergei]

VI_SUCCESS_DEV_NPRESENT

3FFF007D

Session opened successfully, but the device at the specified address is not responding. Check connection, GPIB address of Tek digitzer 5032B.

[Makoto]

As Sergei answered, the WARNING code (not an ERROR) says the device is not responding.  The VISA session itself has been opened successfully, so your program can continue to run if it is not a problem.  (This is why the code is a WARNING, not an ERROR.)  NI-VISA allows to open a GPIB session as long as the GPIB controller (such as GPIB0) does exist and the VISA resource syntax (such as GPIB0::3::INSTR) is correct, even if the device is not ready on the bus. 

However any IO operation with the instrument by using viWrite, viRead, viClear, etc... will generate an ERROR unless the device is ready to control (such as GPIB cable connection, instrument address setting, and instrument power, etc..)