Hello, I already posted my question but I forgot to say that I am using a PCI-GPIB card. So, I post it again : I have Error -1073807343 when calling the open visa function, I am running a Labview 6i under Linux (kernel 2.4). I have verified the name of the session (GPIB0::9::INSTR), and I can communicate with my instruments with ibic. More informations : I use NIVISA 2.5 and nigpib-0.8.2. I have downloaded the lastest drivers of my instruments but it doesn't work better. Thanks very much for your help.
