Map compile error in "vbsp"

I have encountered this error when trying to make a gmod map.
The gmod map is very big and it only consists of a Skybox with a flat plain of geometry, thats all there is.

** Executing…
** Command: “c:\program files (x86)\steam\steamapps\camzi980\sourcesdk\bin\source2009\bin\vbsp.exe”
** Parameters: -game “c:\program files (x86)\steam\steamapps\camzi980\garrysmod\garrysmod” “C:\HammerAutosave\gm_sandland_build.vmf”

Valve Software - vbsp.exe (Sep 15 2011)
4 threads
materialPath: c:\program files (x86)\steam\steamapps\camzi980\garrysmod\garrysmod\materials
Loading C:\HammerAutosave\gm_sandland_build.vmf
Could not locate ‘GameData’ key in c:\program files (x86)\steam\steamapps\camzi980\garrysmod\garrysmod\gameinfo.txt
fixing up env_cubemap materials on brush sides…
ProcessBlock_Thread: 0…1…2…3…4…5…6…7…8…9…10 (0)
ProcessBlock_Thread: 0…1…2…3…4…5…6…7…8…9…10 (0)
Processing areas…done (0)
Building Faces…done (0)
FixTjuncs…
PruneNodes…
WriteBSP…
done (0)
writing C:\HammerAutosave\gm_sandland_build.prt…Building visibility clusters…
done (0)
Creating default LDR cubemaps for env_cubemap using skybox materials:
skybox/sky_day01_01*.vmt
! Run buildcubemaps in the engine to get the correct cube maps.
Creating default HDR cubemaps for env_cubemap using skybox materials:
skybox/sky_day01_01*.vmt
! Run buildcubemaps in the engine to get the correct cube maps.
Finding displacement neighbors…
Finding lightmap sample positions…
Displacement Alpha : 0…1…2…3…4…5…6…7…8…9…10
Building Physics collision data…

** Executing…
** Command: “c:\program files (x86)\steam\steamapps\camzi980\sourcesdk\bin\source2009\bin\vvis.exe”
** Parameters: -game “c:\program files (x86)\steam\steamapps\camzi980\garrysmod\garrysmod” “C:\HammerAutosave\gm_sandland_build”

Valve Software - vvis.exe (Sep 15 2011)
4 threads
reading c:\hammerautosave\gm_sandland_build.bsp
Error opening c:\hammerautosave\gm_sandland_build.bsp

** Executing…
** Command: “c:\program files (x86)\steam\steamapps\camzi980\sourcesdk\bin\source2009\bin\vrad.exe”
** Parameters: -game “c:\program files (x86)\steam\steamapps\camzi980\garrysmod\garrysmod” “C:\HammerAutosave\gm_sandland_build”

Valve Software - vrad.exe SSE (Sep 15 2011)

  Valve Radiosity Simulator     

4 threads
Could not find lights.rad in lights.rad.
Trying VRAD BIN directory instead…
Warning: Couldn’t open texlight file c:\program files (x86)\steam\steamapps\camzi980\sourcesdk\bin\source2009\bin\lights.rad.
Loading c:\hammerautosave\gm_sandland_build.bsp
Error opening c:\hammerautosave\gm_sandland_build.bsp

** Executing…
** Command: Copy File
** Parameters: “C:\HammerAutosave\gm_sandland_build.bsp” “c:\program files (x86)\steam\steamapps\camzi980\garrysmod\garrysmod\maps\gm_sandland_build.bsp”

The command failed. Windows reported the error:
“The system cannot find the file specified.”

I tried figuring out what it means but I cant seem to understand. Anyone know what this is?

Thank you for your time.


(User was banned for this post ("Wrong section" - Gran PC))

Check for problems ( alt + p ) in your map and post what you find.