I've seen this before. Can't remember how to fix it, but I HAVE seen it.
.BSP files are maps, both for SP and MP. .DCL files (I think) are the list of models for objects within maps. I'm not sure about that though. Here's what you can try to do to fix this:
1) If you have any custom files you downloaded, try taking them out, and replacing them one by one, seeing which one gives you the error.
2) Install the V1.11 patch, if you haven't done so already.
3) Reinstall the game. Here's how to do it properly.
[quote:fdc86]a) Start>Settings>Control Panel>Add/Remove Programs. Remove MOH. If it asks you to repair the install, don't. Choose remove.
b) Reboot your machine once done.
c) Goto
http://www.jv16.org, and download the Registry Cleaner.
d) Use Tools>Registry Cleanup>Do Them All, and remove all the bad MOH keys. Depending on your system, it might delete them automatically, it might not. Watch the list that accumlates from the program. If it accumlates, then dissapears when it's done, it deleted the bad keys automatically. If it sits there once done, you need to select all the bad keys, and delete them all.
e) Reboot the machine
f) Reinstall MOH
g) install the V1.11 Patch
h) Run the Auto-Config in the MOH directory.
I) Boot up MOH.[/quote:fdc86]
Hope that helps!