_wb mesh thicken

Hi!

I have some problem with _wb mesh thicken and _wb catmull commands. 

I have a really simple geometry. I used the m+ loop and after that I want to thicken this. But I cant bake this. It would be better, if Ii could use the catmull after the thicken command, but the gh says that I should use the clean up, what I couldnt find anywhere.

When I used them on quad geometry It worked.

So now I cant bake it, I cant do anything useful after the _m+ loop.  

What can I do to have a real object? 

Thank u!

Heni