ProgressBar problem whit Qt

Hello Users,

 

I am using UHD 3.7.11, Gnuradio 3.14 and I develop in Python.

When I try to update my progress bar I have this error : QPixmap: It is not safe to use pixmaps outside the GUI thread.

 

In the first time, I have try to update my bar in other thread without signal and in the second time I have try to use signal but in both cases I have this error and the issue is that my program crash.

 

Someone has an idea on how can I solve it please ?

 

Thanks for your help.

 

Regards.