I've created a model i want to use in my map and everytime i try to compile my files with guistudiomdl i get this error-

Created command line: "C:\Program Files (x86)\Steam\steamapps\STEAMID\sourcesdk\bin\ep1\bin\studiomdl.exe" -game "c:\program files (x86)\steam\steamapps\STEAMID\half-life 2\hl2" -notxbox "C:\Program Files (x86)\Steam\steamapps\STEAMID\half-life 2\hl2\models\cake\cake.qc"

and yes, i do have steam running when i compile