Yesterday I install Lyx on Tumbleweed. I has been used this application previously at Leap, but here on tumbleweed when I want change the document type I get an error about that I need install a document class (for example article.cls). These files are installed on my system, but Lyx just can't found them, I reconfigure Lyx but the problem is still there. And I don't have idea about how tell to Lyx where are these file. Any idea? Thanks.