Hello all, I am pretty new to labview coding, and still learning. I keep getting this error (Error 1 occurred at Scan From String (arg 1)). I have no idea why I am getting it, I checked the connections to the Vector network analyzer and they are all fine, my goal is to read frequency data from the analyzer. The code stops at the scan from string node. Looking forward to hearing from you! aas552

@aas552 wrote: Many thanks for your reply! The fit circle always worked for me before I got this error, so I assumed it was fine. I will work on it. It is definitely not fine! If the values of the indicators only change little between calls, you might get results that are only slightly wrong (the worst kind of bug, because it is hard to detect!). Even if it works correctly now, it could fail after tiny changes in the future. (e.g. a recompile caused by a edit operation elsewhere, an upgrade or downgrade to a different LabVIEW version, running on a computer with a different number of CPU cores, etc.)

@aas552 wrote: The last VI is attached that would be the end of the last part. This VI will not work as expected because of race conditions due to the blatant overuse of local variables. For example the local variable of R will get read way before the other part of the code has a chance to update the indicator, thus you get stale data and the outcome is unpredictable. Same for xtrunc and ytrunc. Get rid of the local variable and use wires to ensure correct execution order. I have not looked at your other code, but I assume that there are similar glaring race conditions, so fix all these first. Also, why do you think you need to divide 360 by 2pi 360 times (!) in a loop? Wouldn't once be enough?

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