I thought recognized that hp415x_ConfigueSMU_FIXED vi! I can't find the post where that code came from a link here that would be good.
I made that fix years ago to address a bug I ran into in the driver code here - https://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=015E42A1245448B2E0440003BA7CC...
It should be noted that it can be use with the Hp4156 driver as well - https://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=5D13BA2F1F47284FE0440003BA7CC...
I don't think that code fix is relevant or needed in your use case, as it was only an issue when the Hp415x had the pulse expander module Hp41501B installed. But it would be good if you described your setup a bit further to see if you are using this module.
Now the code you attached has some problems, mainly in understanding how the instrument functions, and as a result some code structure problems.
I assume you are new to SMUs and HP4156 as well as LabVIEW? The Hp4156 will perform a sweep (I or V) on one or more channels, while also measuring on one or more channels. Once that sweep it complete all the data measured can be transferred to the PC. Knowing this, the procedure for coding is to set the instrument into the state to perform the sweep, let the instrument perform the sweep and do the measurements, the retrieve the data.
You should look in the Examples folder of the drivers (either linked above) as they have a simple Sweep and Measure example that should work for you.
With regards to your code..
1 - The sequence structure isn't required, you should review LabVIEW's dataflow model.
2 - There's need for a while loop, the instrument does the sweep internally. What you have programed there is multiple repeats of setting up the instrument communications, defining the measurement, retrieving data, closing communications in a loop.
3 - If you did want to do repeated sweeps using a while loop, you would want to take the instrument initialization/close and instrument setup code out of the loop. The loop would only trigger the measurement and retrieve the data. You would use shift registers to accomplish multiple plots.
Have a look at the simple sweep and then let me know if you need further assistance. If so you will need to be more descriptive.
