Crash tile build

Hi,

I am using WM Pro and when I try to build 6 tiles or more WM will crash
Last week it was working fine but now it wont work anymore it keeps crashing

It seems to crash at the last minute of rendering when it is blending all tiles
Windows does say I should look at:
WER10C3.tmp.appcompat.txt
WER121C.tmp.mdmp
WERE6C6.tmp.WERInternalMetadata.xml

Is there a crash log somewhere I can look at?