After stacking our last stack (giving us 18 hay) and saving, closing and re-opening, we received the following error in our log file and the tractors (and implements) began "falling". We would tab into a tractor that was "falling" into blackness (see screenshots below). We were attempting to stack full stacks of bales (just before the bug we reached 15 straw and 17 hay) in a barn.
Log file error
PhysX unknown error: Internal error: Too many pairs created, new pairs will be ignored. This is perhaps due to an excessive number of objects created at one location.
In order to fix this, we had to sell off one entire stack of bales.
Our Stacked Bales
![Image](http://farm9.staticflickr.com/8345/8280401368_383b8ac3bf_c.jpg)
Objects falling (view looking down)
![Image](http://farm9.staticflickr.com/8200/8279344673_477eb2507b_c.jpg)
View looking up
![Image](http://farm9.staticflickr.com/8204/8279344727_092c8617a8_c.jpg)