Hello
I was playing a CS map when CW3 crashed with out of memory error. (and the map I was playing was not auto-saved)
I zipped the fodler named "2015-05-26_081326" with contents of error.log output.log in case it can help
That's a first time error. The usual advice is to reboot and see if it happens again. After that, try and download CW3 again.
http://knucklecracker.com/creeperworld3/redownload.php
Uninstall, then install again.
Also look in Documents -> CreeperWorld3 -> colonialspace -> maps for the map range of the map you tried to play. Delete the downloaded and if any, autosave of that map and download that again.
All else failing, then the error log is correct and your RAM is starting to go bad. :(