"Cannot find Terrain.cfg" Map help Please? D:

[Clan]

So, I have finished a map, I restarted my laptop, then when I went back to add music to finish it off, when I tried to open nit from Map maker it came up with:
"Unable to find Terrain.cfg"
Help, please?

[Kerriki]

When you finished your map (before you restarted your computer), did you click export?

[Clan]

When you finished your map (before you restarted your computer), did you click export?

No, I didnt, only saved it.

[Kerriki]

Hm... if it says what it says, could you have deleted the map's heightmap/terrainmask by mistake? It happens sometimes.

[Clan]

Both Mask and Terrain is still there, everything seems to be in place, like a normal map. D:

[lissbat]

Im having the exact same problem! Both The Terrain mask and height map are there, but its not working!