Look at your block diagram. The function 4 in from the right and two down from the top (I'm just guessing here, because I'm not really sure where in your code the mistake is, but I'm trusting my ESP) is wrong.
Of course, if you had attached your VI (preferably saved in LabVIEW 2019 or earlier, using "Save for Previous Version", I probably would have to guess. I'm pretty good with the RGT, but not as good in Long Range Mind-Reading ...
Bob Schor
P.S. -- the error may involve a Queue, and possibly a problem with Data Flow. Does that help?
