Initially NI-MAX would not see a Keithley DMM connected to a GPIB card installed in a PCI slot in this computer. In order to get a GPIB card made by HP-Agilent-Keysight to work, I downloaded "Agilent IO Connection Expert" version 16.3. This software immediately found the instrument that is connected to it when I hit "Add an instrument". Still NI-MAX could not see the instrument, but I read from one of your posts that you have to enable NIVISA Tulip.dll. I found in NI-MAX under NI-VISA 15.0, General Settings -> Passports, an unchecked box for NiVisaTulip.dll so I checked it. After that I opened the Agilent Connection Expert, went to Tools -> Agilent 488 -> Agilent 488 Options tab, and tried to check the box "Enable Agilent GPIB cards for 488 programs". It came back with the message "Connection Expert could not enable Agilent 488 because a file is in use. Reboot you PC and try again." Rebooting and trying again had no effect. So what am I missing here? Are there some other settings in NI-MAX that I need to make?
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