Error with maps

Hey it's me again looking for help lol, well anyway, I'm trying to make a ice cave but I get a error when I try to go to the dungeon, and yes the code should be right.

error: http://prntscr.com/chx03u

And yes I have set it as embedded resource, and the map is a wmap file.

Any help will be appreciated.

Try to use a .jm file instead of a wmap

I'll try, thank you for the reply.