This is an excerpt from a discussion on the main bbs.
Prompted by a special request, I am including this additional note about this error. The information on the error page should be adequate to solve the trouble; there is no mystery or doubts about this problem or how to fix it. But let's review it again.
There is a conflict between traxx 1.4 and windows explorer. This conflict causes the file extension to be cut off from the bin file name. When this happens, the game does not recognize the bin, and it produces the error described. The workaround is to just uncheck the box for the "hide file extension for known file types" in windows explorer folder options.
Then, just reload the models into the models box and voila. That's it. That's all there is to it.
On the other hand, if you have a track podded that was made by someone else who did not do this and it will not run or it is interfering with another track (perhaps your own), then you have to:
1.) pod your track higher in the list (the problem track is interfering with your own),
Anyway, if a track used to be fine but gets this error now, then it's probably still good. Just move the track in question higher up in the pod.ini list.
However, if you want to do a bit of troubleshooting, use pod view and look in the models box for any suspicious tracks you may have. All models should have the "bin" extension.
When you find a track that has models without the "bin" extension, then you've found your trouble maker. And that goes for no matter who made the track.
The bottom line is this : THERE IS NOTHING WRONG WITH THE MODELS YOU'RE USING. The problem is the track and the way is was made.