openings of any shape in walls

[PSP11]

Hello.
modeling ruins of a castle I need to drill the existing masonry detected and shaped with the wall command and defined with profile modification to insert a variable section opening in width.

I can shape a local mass, but I can't get her to accept the program because she says:
"This mass does not have solid geometries from which to cut gaps. must be eliminated or it is necessary to add solid geometries to be cut. "

the opening is a classic rectangle with a rounded side, with a width of 1.5m inside and 0.7m external, with fixed wire along one of the sides of the window.

I hope you can help me.

Paolo Pagano
version: revit 2012 - version for students

 

[render54]

:36_1_4: I am sure that a screen saver with the screen saw or saw the problem
no eh:36_1_28:

 

[gfrank]

I didn't understand...
the type of error reported, normally, is displayed when the geometry is not combined (e.g. empty + wall)....
However, if the problem is "opening a hole in the wall", use a specific family on a wall host, with a vacuum shaped to your needs, which subsequently amounts to the project wall