There most likely is, considering that it would be highly improbable for the flash developers would make a way to have such a big movie clip.
Seriously, you DO NOT need such a large clip. I can't even count the ways around it.
I also don't know the limit that flash has, but you might have passed it. It could also just be overflow, because the value is too large to hold in the space provided. Submit the bug report if you really want to, but they won't be obligated to do anything about it, considering it isn't much of a bug. :P Good luck!