In late time i have problems building exe file. Unity just crashes. i have no problem building one scene but when i build many Unity just crashes end displays error out of memory or other errors or just shut down. Cold it be becose i don’t have enaf ram or is other problem?
You either don’t have enough ram or your project uses more assets than you can have without building distinct scenes / asset bundles and reducing the core player
try use Mac…
try 64bit OS
try Delete project,Haaa~~
64bit OS does not help, a 32bit application can even on them only use 4GB.
This holds for Win64bit as well as for Unity on OSX 
the only way to really get around it is having pro and building distinct scenes / asset bundles through editor scripts.