Hi KC,
uh-oh - problems...
Conversion to LV7.1 introduced a lot of insane objects on frontpanel - preventing to open the (down-converted) vi in LV6.1... Probably because of variant datatype and those waveform graphs/charts.
You should rework this vi to use some sub-vis for those repeating operations (this would greatly enhance readability too). Then make a screen snapshot in LV8.0 and re-code this in LV6.0
Best regards,
GerdW
using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019