# TestStand Pop Up "Value Must be at least Zero" When Opened

Updated Nov 20, 2020

• TestStand

## Issue Details

After restarting my PC, when I open NI TestStand, it will pop up a message "The value must be at least zero", how can I solve this issue?

## Solution

There are multiple solutions to go for in this case:

• The frontend.dll file might be corrupted. You can resolve this problem by moving this file from another PC with a working install to the corresponding location:
• For 32-bit: C:\Program Files (x86)\National Instruments\TestStand 20XX\Components\Callbacks\FrontEnd\Win32\frontend.dll of this PC.
• For 64-bit: C:\Program Files\National Instruments\TestStand 20XX\Components\Callbacks\FrontEnd\x64\frontend.dll of this PC.
• If the above solution didn't work, try repairing or reinstalling the NI TestStand Software