major hpl issue

[Romulator]

Delete the map_cache file for your 4th level if there is one. Then try again.

If that doesn't work:
Make sure your level has been saved in the Level Editor.

Make sure that there are no other .map files with the same filename anywhere in your /redist folder and subdirectories. (for example, you should only have one level_04.map).

If those still don't resolve the issue, play the level for a sec, then exit and post the hpl.log file. It will be located in Documents/Amnesia/Main/ If you are running Windows.