I've been trying to fix this. I have tried many things including reinstalling the launcher. Deleting the image execution key in regedit and then hooking the game again.
Now I get a better log file generated:
----- C&C:Online Launcher Start ----- Game: C&C3 C&C3 Install Path: F:\Origin Games\Command Conquer 3 Tiberium Wars\ Started game with: ""F:\Origin Games\Command Conquer 3 Tiberium Wars\RetailExe\1.9\..\..\CNC3.exe" -config "F:\Origin Games\Command Conquer 3 Tiberium Wars\CNC3_english_1.9.SkuDef" -ead_gl_nogenerate " Caught CREATE_PROCESS_DEBUG_EVENT from C&C3. Detaching... ERROR: game.dat process not found.
What could this mean?