I'm trying to make a key animation for a gun 3do i just created, but when i try to open the 3do file, i get the error, "floating point division by zero". This only happens when i load the external or internal models, not when i load the powerup model. Can somebody explain this?

Some programs that create or modify 3do files do not handle the 3do data correctly.

To get around the problem, try importing the 3do into ZED and then export it. ZED might fix the number problem.

I don't think that's the case because I created the program with JED. Is there a better defenition of what the error exactly means?

What does consistency checker say in JED? Any unplanar surfaces or the like? Or maybe your structures are too small and PJED uses a shorter datatype to represent floating point values, so your values get truncated to zero?

Puppetjedi does that if it can't find the materials for the model. Make sure the materials are located in a /mat subdirectory of the model.

Shred is correct. If you don't know what textures (.mat files) you actually need, open up your .3do in Notepad and you will see right away what textures are being called for.

If you export your .3do from JED, it will see any UNused texture files listed in your .3do and remove them, as to help keep your MAT folder clean from unnecessary junk.