I tried validating my script a little while ago, but every time I clicked the validate button, it told me that my file was either an invalid PDF format or a PDF with 0 pages. I'm not exactly sure what that means, but I'm guessing I haven't saved my file correctly. If someone could tell me what I'm doing wrong, it would be greatly appreciated!

The best thing to do will be to ask in the threads in the NaNo technology forum to see if there's a special way you're supposed to be doing it in your program. (There's so many different programs, we can't really troubleshoot them all.)

Verify that you're saving it in PDF format only (.pdf) because that's the only kind of file format the validator will read.