Tried to free a color that is not allocated (Error when run python -B main.py in cmd

[mabeljuhi]

I have an appliation that i develop using python ,

it is a face recognition application ,

I have run it in my pc ,

i can not create a single setup so i run it by using cmd ,

i use this command 'python -B main.py'

but after several second at a random time ,it is error with error message like this

enter image description here

can you help me about this?