What's this error file?

Remember it takes a while for any computer to render the details. I get white/gray objects sometimes when I switch from say following my Sim to work or a community lot and then switch back "home". The computer has to "re-render" the objects again as the camera was on other details. It doesn't bother me. I play with my graphics on either medium or in some cases high. I'll have to check it out next time I start up the game.

***Edit***

I play with most settings on High, High Detail Lots 3, and in 1600 x 900 resolution so I can read the control panel. :)