viRead() error 0xBFFF0012 (VI_ERROR_INV_RSRC_NAME)

[mschaef02]

Dear LabView community,

I am trying to control my Toellner PSU by using the integrated GBIP port with the VISA driver. My program is written in c++.

Initialization and command writing works fine, but when I try to read back the response by using viRead(), the error 0xBFFF0012 (VI_ERROR_INV_RSRC_NAME) occurs.

I find this a little bit strange, because in the viWrite() function, I'm using the exact same resource name.

What I'm doing wrong? Thank you for your suggestions!

output from NI I/O-Trace:

code lines (C++):

[mschaef02 · Accepted solution]

I found the error:

during the viRead() function call I gave a non existing item of the buffer instead of the buffer itself. So by changing the line to

status = viRead(instr, (ViBuf) buffer, MAX_CNT-1, &retCount);

everything works fine. 😁