Something

** Executing...
** Command: "c:\programme\steam\steamapps\the_stoner\sourcesdk\bin\ep1\bin\vbsp.exe"
** Parameters: -game "c:\programme\steam\steamapps\SourceMods\gmod9" "C:\Programme\steam\SteamApps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4"

Valve Software - vbsp.exe (Dec 11 2006)
2 threads
Can't load MaterialSystem.dll


** Executing...
** Command: "c:\programme\steam\steamapps\the_stoner\sourcesdk\bin\ep1\bin\vvis.exe"
** Parameters: -game "c:\programme\steam\steamapps\SourceMods\gmod9" "C:\Programme\steam\SteamApps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4"

Valve Software - vvis.exe (Nov  8 2007)
2 threads
reading c:\programme\steam\steamapps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4.bsp
Error opening c:\programme\steam\steamapps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4.bsp

** Executing...
** Command: "c:\programme\steam\steamapps\the_stoner\sourcesdk\bin\ep1\bin\vrad.exe"
** Parameters:  -game "c:\programme\steam\steamapps\SourceMods\gmod9" "C:\Programme\steam\SteamApps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4"

Valve Software - vrad.exe SSE (Nov  8 2007)
----- Radiosity Simulator ----
2 threads
Could not find lights.rad in lights.rad.
Trying VRAD BIN directory instead...
Warning: Couldn't open texlight file c:\programme\steam\steamapps\the_stoner\sourcesdk\bin\ep1\bin\lights.rad.
Loading c:\programme\steam\steamapps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4.bsp
Error opening c:\programme\steam\steamapps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4.bsp

** Executing...
** Command: Copy File
** Parameters: "C:\Programme\steam\SteamApps\the_stoner\sourcesdk_content\hl2mp\mapsrc\gm_grass_water_v4.bsp" "c:\programme\steam\steamapps\the_stoner\half-life 2 deathmatch\hl2mp\maps\gm_grass_water_v4.bsp"

The command failed. Windows reported the error:
  "Das System kann die angegebene Datei nicht finden."

** Executing...
** Command: "c:\programme\steam\steamapps\SourceMods\gmod9\hl2.exe"
** Parameters: -game "c:\programme\steam\steamapps\SourceMods\gmod9"  +map "gm_grass_water_v4"