Error: The selection contains complex artwork that may cause the system to become unresponsive in Ai

I use Illustrator to clean up flattened 3D files. In order to do this, I use the Live Paint bucket and triple click to fill all faces. Basically removing 1000's of overlapping lines. When the artwork is too large, I receive an arror message saying:  

"The selection contains complex artwork that may cause the system to become unresponsive during conversion to a Live Paint group. It is recommended that you save your file (I have) before proceeding. For better performance, convert parts of the artwork one at a time. "

This error message pops up between the 2nd and 3rd click, which interrupts the process and causes Illustrator to only fill the one face under the bucket tool.  

Is there anyway to supress this error or tell it to not show again? I do this nearly everyday, so I know how long it will take, based on the 3d file's complexity. What I dont know is the threashold of complexity that causes Illustrator to trigger this error. I've broken the file done into the smallest parts I can without spending loads of time. I've also reduced the amount of trash I'm receiving from the 3d program as far as I can. If I can just remove this error, I'm willing to wait. 

{Renamed by MOD}