Nobody can tell you anything without exact system info or other technical details liek comp settings, render settings, footage used, effects in the comp and ultimately what you do to make the Motion Tile effect go *kaboom*.
Sorry for this issue. Did you ever find a solution? Please let us know if you have or if you still need help.
The motion tile effect is a very resource demanding effect so your system might run out of memory. I recommend you try to render the project as a Jpeg Sequence. This way, if the render crashes, you can resume the render process. Here's how to do it: