I am a high school teacher, attempting to teach a few simple animations in Flash. The only action script students have written is the stop action in the last frame. I have one student, though, who has drawn a snowman and a tree using oval and paintbrush tools. Every time she tries to export as .swf (or pressing Ctrl+Enter) the progress bar stops half-way and sits. She's waited 5 minutes and hasn't had any luck. Her .fla file is only 1 mb so I don't think it's a memory issue. Is there anything else that's keeping her file from being unable to export as .swf? The compressed checkbox is on in the export options.
There willl be issues if there's large soundtrack that has to be encoded in mp3 or too many (thousands) of symbols in the movie. Otherwise everything has to be OK. What version of Flash are you using, btw?
Version CS3. No sound. The student drew a snowman and a tree with the
paintbrush tool. She converted everything to symbols.