problematic surfaces for mesh. where are they?

[folle76]

Hello.
after getting the following error message I don't scare myself and I go looking for "default" surfaces. Where are they? I imported many other proes .stp, but I never got such a mistake. Can anyone help me? Thank you.

 

[eih64]

to see the faulty areas you are told.
wireframe mode and right click on error

 

[Michele980]

Hi.
right click on the first message, the "show problematic geometry" option should come out.clicking on it highlights you in green the surfaces that give mesh problems

 

[folle76]

Thanks for the answers. I set up a couple of surfaces and everything went ok. soon!