I'm navmeshing a piece of land that i made but there's this invisible barrier that stops me from meshing it.

duz anyone know what the deal is? I thought i can mesh wherever i pleased

You can, but nav mesh can not cross cell borders. Press B to toggle the borders in the render window. I'm not privy to how to link navmesh from different cells.

Sounds like a cell border. Hit B to toggle boarders. If one is there, you need to make two seperate unconnected navmeshes. One on each side of the cell border. Then, line the edges of them up as best you can, and when you finalize the navmesh a green line should appear, signifying where the navmeshes are 'connected'.

Cheers guys i'l try that out

...man that's horrible, thanks bethesda.