habe hier noch einen vorschlag aus dem crymod forum...ich teste das gleich einfach mal.

hi friend...

i saw your problem i just had this problem..for me the solution was

your map (on u r working right now) its has a levels.pak file and in it u have terrain folder
so in that there is a file called cover.ctc that file is corrupt..so replace it from your backup files..

if it doesn't work then replace both levels.pak and terraintexture.pak