how can i copy my map without hammer crashing?

[The Ottogirl]

so i made the red half of the koth map that i am working on and i want to copy and paste the map to finish it but hammer keeps crashing when i try to do that.

 

[worMatty]

Are you selecting everything by doing Edit > Select All?

 

[The Ottogirl]

Are you selecting everything by doing Edit > Select All?

im selecting all by clicking map properties

 

[Sonoma]

Do not do it like that!!!

This will duplicate the worldspawn entity which will cause fatal errors

please watch this tutorial

View: https://www.youtube.com/watch?v=cuCMZ86XBqI


H++ makes this even easier by having a pivot point tool you can drag out while in rotation mode