can someone tell me how to fix this

[Nitrillion500]

so i open level converter and i pick 2 maps (TriopolisTown.wad, scr_DeathEggZone.wad) and i run them with the level converter, it says it works but when i try it in 2.0-2.2, it says "GFZBLOK2@" not found
any help?

 

[CG64]

ig you need to remove the '@' character in the texture name used in a level editor.