Thanks for reply,
I tried to get channel status but it doesn't work too. I think it is because I don't really know how to use correctly the channels yet. In my case, the error refers to an undentified location. Yet, I use only the slot 3 with a 3721 (I indicated this on the front panel). For now, I have just no idea why the keithley is not responding just with the control of the channels. Could it be a mistake with the data entered in the front panel ? Do they seem coherent ?
Best regards