One of the things that might not be intuitive to you when you first pick up SRPG Studio is the distinction
you can write in the clear conditions with Map Info, and what actually causes a map to end.
The former will be displayed in-game while playing that map, like so:
However, this display does not actually affect how and when the map ends. To make these work, you will need auto events.
This is a type of map that requires you to survive for a number of turns, as shown above.