Hi Rashid,
I think you have not added the events for the varaibles present on the Thermocouples Tab of your VI, in the 2nd Event Case of the Event Structure [ES] inside the While loop in the 2nd frame of the Stacked Sequence Structure...
Else, it ll work on the Mouse Enter event for thoise controls present on the 3rd Tab Page also.

- Partha ( CLD until Oct 2027 🙂 )