Lumper was not loading files properly due to an invalid file path being used when initializing the bsp file object. For instance loading arena_offblast_final would result in the file path:
C:\Program%20Files%20(x86)\Steam\steamapps\common\Team%20Fortress%202\tf\maps\arena_offblast_final.bsp
The file would fail to open (on windows) with the escape characters in place of the spaces. The fix for this is to strip these to provide
C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\maps\arena_offblast_final.bsp
using C#'s Uri features.
Lumper was not loading files properly due to an invalid file path being used when initializing the bsp file object. For instance loading arena_offblast_final would result in the file path:
C:\Program%20Files%20(x86)\Steam\steamapps\common\Team%20Fortress%202\tf\maps\arena_offblast_final.bspThe file would fail to open (on windows) with the escape characters in place of the spaces. The fix for this is to strip these to provideC:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\maps\arena_offblast_final.bspusing C#'s Uri features.