Revit rebar in circular wall

[Anonymous]

Hello,

I'm trying to place a rebar in a circular wall. I went on my 3d view and select Rebar/Free form rebar. And I went to Properties/Edit type/12 400S for the type of rebar/ok. When I try to select the wall where I would like to insert the rebar, then nothing happens. I just can't select it. Can you please help? 

[PavelAnd]

Hi @Anonymous . Are you shure that the wall is structural? 

[Anonymous]

Hi @PavelAnd ,

Thanks a lot, it works now. However, I can now select my walls, but as soon as I change the layout (from Single to Fixed number or Max spacing), the green tick becomes grey and I have to cancel. This means that I have to keep it on Single mode to validate. Could you please help? Thanks