Help please with extrude along a path!!

I'm using R14 and I'm attempting to extrude a pline along a path, but
I'm getting weird results.

I have created a simple floor plan which is basically two corridors
intersecting to create a "T". I have filleted one of the corners with a
2' radius and left the other square. I then created a simple moulding
profile that I wish to extrude along the inside of the wall, down the
other corridor and back up and along the wall on the other side. The
problem is, the moulding extrudes along the front walls just fine (in
the Z direction for the current UCS), but when it turns the corner down
the corridor (going in the negative X direction) it ends up behind the
walls, on the other side of the path. Curiously, when I extrude a very
simple rectangle, it extruded just fine. But as soon as I put even a
little step in the profile, it causes the same problem. Why is that?
What am I doing wrong?

Thanks for any help.

Brett

 

if the only problem is extrusion at the radius, maybe you could split it up, use revolve to get the molding around the radius, and path extrude for the rest

 

My own exoerience and problems with things not extruding along a path
have at the root of the problem some inaccuracy with the path. Set
your display accuracy to 1/256 and 4 decimal places on angles and
carefully check the pline pathway for errors. There's really no other
good reason for not extruding properly if the path is precisely
located.

 

Jack,

Thanks for your response. At first I thought the problem might be the
radius too, however, the problem also occurs at the other side of the
'T'. It seems to work fine on the 'Y' axis, but all parts of the
extrusion on the 'X' axis - going either direction - fall behind the
path and therefore my wall. Picture the top of the 'T' as the 'Y' axis.

It seems only to happen when the profile to extrude has more than 4 flat
faces.

Any other thoughts?

Brett

 

Is the path element anLWPOLYLINE or a splined 3dployline??