Win7 64bit. DX11 game executable.
While testing patch 13 for the trains and convoys running I was minimizing the game to desktop from time to time and letting the game run. After about 30-40 minutes of the convoys and trains running successfully, opening the game to check the trains and convoys, I minimized the game again. A few minutes after that an error for the DX11 executable popped up on the screen and the game closed down. A DMP file was generated and is attached.
This is that test terrain rawtest which now has several large lakes created from river paths on it.