Capping hole in poly object

[tricky]

What is the best way to create a cap on the attached wall geometry? I have tried 'create' a face, snapping to all the verts, but that says 'illegal face' or something. Cap holes modifier doesnt work. Selecting the perimeter edges and going into graphite modelling tools and choosing 'cap holes' doesn't work.

Any ideas?

[AJ Jefferies]

You've got a poly that needs flipping here :

Once you've done that, select the Border sub-object, select the open hole and hit 'Cap' under Edit Borders. Should be fine

[tricky]

You've got a poly that needs flipping here :

Once you've done that, select the Border sub-object, select the open hole and hit 'Cap' under Edit Borders. Should be fine

Bugger - missed that. Cheers fella!