Animation Viewer
Included in CorsixTH is a tool called AnimView, which can be used to view the animation files of the original Theme Hospital game (or the demo version).
Certainly you've used the export function before and then this situation could occur. If you have ever performed the export function in AnimView and want to revert back to just loading the standard files from the game (and resolve this problem) you need to remove the file VSPR-0.xml from the Theme Hospital folder.
You can find this file in Hospital\Data or Hosp\Data. If you see this file then delete it and then try to use AnimView and it should resolve this issue. See issue 1579.
You will need wxWidgets and specifically the tool wx-config, which can be found in the libwxgtk2.8-dev package. With this installed, simply compile and run:
cd AnimView
make
./AnimView