Exporting problem

[scrangles]

I have the Audacity 1.3.7 for my PC. I love it with all the wonderful things I can create on it, but I am having a problem exporting my project. In the resulting exported .wav file, when the track gets to a certain point it just cuts off and is silent for the whole rest of the track. The point where it happens is where I use kind of a wave interference sort of effect using a distorted square wave. I am not sure if it is something because of the sound at that moment that confuses the program or is just not compatible with the .wav file type or if it is just my computer or something else. Does anyone understand at all what I am doing and what the problem might be?
-Mark

[steve]

Check the amount of free disk space, there may not be enough free space to complete the operation.