Can't keep wall and floor joined

[minka10]

I am trying to attach top of a wall to the series of double sloping (triangular ) floor slabs above.
Wall does attach to a few, but for most of them I get the error message:
"Can't keep wall and floor joined". How do I fix this?

[beegee]

Might be best to post a purged file with the sample condition so we can take a look.

[Mr Spot]

Check to make sure the wall edges are completely under the floor to be attached. It doesn't matter if the wall's end point extends beyond the floor but the actual depth of the wall needs to be contained in the floor in order to attach.

Also, i assume your floor has either been done with an in-place or external family. In this case check to make sure the floor isn't overlapping itself anywhere (multiple levels) as this will confuse the wall and not know which part of the floor to join to.

HTH.