I've got a (small) level where I've tried to include a WMB-entity.

Specifically, I had tried to use the Dexsoft SEWER-MDLs. I created a Sewer-maze and then compiled it (no errors).

In my main level, I added the WMB that was created by the step above. It shows up in WED OK ... no problem.

I can compile the level without errors or warnings.

When I run the level, I get an error "W1513: crash in main".

Am I doing something that is just not supposed to be done (creating a WMB from MDLs) ?

If I add the MDLs directly to my main level, everything works fine.

One thing that is "special" is that the Dexsoft MDLs are one-sided. Could this be an issue ?

Cheers,
Andreas