That size of image is extremely large and will push TG 0.9 to its limits in Windows. 11,500x11,500 is the maximum pixel area I have ever successfully rendered, after many successive tests. Your total pixel area is actually lower than that, even though one dimension is larger, so it should be possible to render it successfully provided you have at least 1GB and preferably 2+GB's of RAM. First, reboot your machine and make sure any resident processes are disabled. Then open the scene and terrain and go to the Render Settings and set the Render Buffer to 5MB. Then try rendering again. If it still fails try turning off antialiasing.
- Oshyan