I get this message when loading a map "TFnumforname -1 not found" I tried Deepsea and Doombuilder error checking options but didn't find any map errors. Any suggestions? Thanks!

Aparently there's some wall with texture named "-1". The new texture manager will not treat it as "no texture" anymore. You can set console variable ignore_missing_textures to 1 to get past this problem.