I have a similar problem, and it does not occur until after a level load.
A year ago I solved the problem by having all my textures in the DDS format.

Now, however i can only Maximum change to 2 level,s after this i become the Error E1513, In the most diverse varieties!

The levels individually can be run and error-free, only that my video memory fills quickly after Level Load .

Someone has a suggestion where I should start?