Hey there! I am new to Labview and I am having trouble with a timeout error/error -1073807339. I’m trying to operate a Keithley 6221 ac/dc current source and an SR 860 lock-in amplifier (separately for now), and since there is no premade driver for the lock-in, I need to operate them through NI VISA. As of right now all I’m trying to do is make sure everything is communicating correctly between the instruments and the PC. They are connected via ethernet cables, and seem to be functioning correctly in NI MAX. I’ve made the following VI, which gives a timeout error if anything is written into the “write buffer.” However, no error occurs when no value is given. I am not sure why this is, or how to make it work in both cases. Thanks in advance for your help!

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Thanks for your help! I'll try to run some more commands and figure out if it's responding to them correctly.

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