maximal map height

Hi, I want make a HUGE map for me and my friend to play with GBombs 5 rockets.
When I made a huge skybox I wanted to test it out, but when I tried to compile a map I got a nice error:

** Executing...
** Command: "D:\Steam\SteamApps\common\GarrysMod\bin\vbsp.exe"
** Parameters: -game "D:\Steam\SteamApps\common\Half-Life 2\hl2" "D:\Steam\SteamApps\common\GarrysMod\garrysmod\maps\gm_awesomeflatgrass.vmf"

Failed to load keyvalues file cfg/mount.cfg!
Valve Software - vbsp.exe (Dec  9 2014)
4 threads

But before that error, window popup and it say: vbsp.exe has stopped working
My map height is: 9216u
and it’s width is: 11264u (it’s a square.)

Hope I gave you everything important

That size should be fine. Maybe the cfg file? Ill have someone verify that though

ok, I will check the cache. Thank you

[editline]22nd August 2015[/editline]

oh! It isn’t helped, it’s not only with that map but with all maps. It’s something wrong with vbsp

[editline]22nd August 2015[/editline]

Hl2 Ep2 works fine!