Good but trouble rendering.

I bought this a while ago, and have used it a lot. For many months I have rendered and made short videos. But when I tried to make a 3:14 minute video, and had tons of effects, it wont let me render it all the way through. I spend hours waiting then get "error rendering frame _(frame number)__ (error -1)" every time! I worked for a month on a project and lost all my work!!! Apple, dont ignore our comments, actually do some work and fix the program. It may be only $50 but we payed for you to make a program that will work! Do it please!

Dave52510 about Motion