PM_GetPage: Invalid page request

Hello, I am new to this forum. I have had past experiences with other forums so I'm not that much of a "newbie". I have a wierd problem. I was editing the source code for Wolfenstein 3D by changing the floor colours. Ever since I did that, Wolfenstein 3D crashes on me once I hit E1L3. Actually, when I tested my mod, I never got to E1L3, so I don't know if editing the floor/ceiling colours had anything to do with this. Anyway, it showed this message: (Just click on the image to see it)
Can anyone help?
Thanks!

There should be a unknown/invalid object somewhere on you map.

Nexion wrote:There should be a unknown/invalid object somewhere on you map.

Ok, I'll try to remove that invalid object (as soon as I figure out what it is...)


Alright! It did fix the problem! All I had to do is redo the whole map.

Thanks!