Anno 1602 runs out of GDI handles

After starting the game and running it for about 8 - 10 minutes, the system breaks into kernel debuger with the message, that there are no more GDI handles left. It dosn't matter if one actually do something in the game or just start the game and let it IDLE. Task Manager doesn't show any increased GDI handle use for the game, but I don't know if this is accurate.