ExtractConnectedMeshFaces Failed - Rhino for MAC

Hello I tried to use ExtractConnectedMeshFaces in Rhino MAC, recently updated to Version 6 (6.29.20239.15172, 2020-08-26),

and at the end of the command, I obtained a copy and not extracted the mesh as I want

Thank for your help

@pascal do you have any suggestion? this command fails me and I use it to teach at the university jeje

Best regards

Jesus Lopez