Wrong thread - you posted it on V38 not SVN thread.
Also VRAM mafs are tricky - only
@billw2015 has idea what to do.
Enable Graphics Paging in BUG settings - its in General tab on bottom left.
Your map in save has around 26 000 tiles, where currently Gigantic maps are set to generate around 13 000 tile sized maps.
It is similar to that Pit's scenario, where you downloaded it?
Update to latest SVN, as some bugs with AI were fixed.