I'm trying to communicate with an RF Impedance/Material Analyzer, E4991A (I hope the post fits in here). Therefore I downloaded the "E499x Impedance Analyzer IVI and MATLAB Instrument Drivers" provided on the Keysight website.
I executed the included MATLAB script "AgE499x_ML_Example1" and got the following error massage: AgE499x: Instrument ID query failed.
By setting idquery = false, it is possible to read back the instruments vendor, firmeware revision, serial number etcetera, but I still get an error: AgE499x: Instrument error detected. Use ErrorQuery() to determine error(s).
I got an error number equal -113 and an error message containing Undifiend header.
Can anyone tell me how to fix this problem. I can't find any listing of the error number or error massage.