Error Geometry buiding

Hello,

I have a error message when i try to buid the volumes of my geometry and in dont know why. Can you help me to fixe it?

i attached th screanshoot of the error messages.

Thank for your help

Best regards!

Fadel

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>