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Can not open a connection to network analyzer with GPIB

Question asked by oa on Jun 12, 2018
Latest reply on Jun 12, 2018 by daras

Hello i am trying to communicate with the network analyzer 8753ES over GPIB.

I include the ivi.Visa dll from National Instruments to my project.


When i try to open a connection with  rm.Open("GPIB0::16::INSTR" & vbCrLf, Ivi.Visa.Interop.AccessMode.NO_LOCK, 10000, ""), i get the following exception: "System.Runtime.InteropServices.COMException" HRESULT = 80040011.


I do not know why i get this Exception. I can communicate with the network analyzer over NI MAX software from nationa instruments. But when i try to communicate over my project with visua basic i get the error above.