Reading data from power supply

Hi all
I'm trying to write and read data from two power supplies(Agilent 6643A and N6705B) but I get error as shown in the attached screenshot.

Wishing the best
Sattam
There is no error in the shown image.

Errors appear in the debugger in this way (attached, underscored with red).

best,
_sk
error.png (43.87 KB)