I am using a Keithley 2401 sourcemeter connected to my PC via a GPIB-USB interface. A week ago, I was able to see the device listed after prompting visadevlist and the device would be listed as GPIB0::10::INSTR under ResourceName. Now, visadevlist does not list any GPIB devices, while NI MAX is able to connect to the tool and I am able to read, write and query the tool using the interactive controls. I have upgraded my MATLAB version to 2024a from 2023a, uninstalled and reinstalled the Instrument Control Toolbox, 488.2 and GPIB drivers, NI MAX and NI VISA several times to no avail. I have used instrreset and delete(visadevfind) as well, no difference.I am using a Keithley 2401 sourcemeter connected to my PC via a GPIB-USB interface. A week ago, I was able to see the device listed after prompting visadevlist and the device would be listed as GPIB0::10::INSTR under ResourceName. Now, visadevlist does not list any GPIB devices, while NI MAX is able to connect to the tool and I am able to read, write and query the tool using the interactive controls. I have upgraded my MATLAB version to 2024a from 2023a, uninstalled and reinstalled the Instrument Control Toolbox, 488.2 and GPIB drivers, NI MAX and NI VISA several times to no avail. I have used instrreset and delete(visadevfind) as well, no difference. I am using a Keithley 2401 sourcemeter connected to my PC via a GPIB-USB interface. A week ago, I was able to see the device listed after prompting visadevlist and the device would be listed as GPIB0::10::INSTR under ResourceName. Now, visadevlist does not list any GPIB devices, while NI MAX is able to connect to the tool and I am able to read, write and query the tool using the interactive controls. I have upgraded my MATLAB version to 2024a from 2023a, uninstalled and reinstalled the Instrument Control Toolbox, 488.2 and GPIB drivers, NI MAX and NI VISA several times to no avail. I have used instrreset and delete(visadevfind) as well, no difference. keithley, visa, ni, visadevlist, instrument control, gpib MATLAB Answers — New Questions

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