arch: Invalid XML for View Architecture!

Hi ! I'm creating a module, and I'm stuck on this error : > ValidateError>> Une erreur est apparue lors de la> validation du/des champ(s) arch:> Invalid XML for View Architecture! Here's the file where's the problem : res.companyview.inherit.res.company.formform Can someone explain me what I'm doing wrong ? It's very important ! Thanks in advance.