Push pull tool error

Please will someone help me when I go to use the p/p tool it comes up with a red circle next to it. I’m using Sketchup Make 2016.
Thank you in advance

The red circle means you are trying to use it on a surface that cannot be P/P.
Only single flat faces can be pushpulled.
It wont work on a curved face or any face contained within a group or component unless the G/C is open for editing.

When you start drawing lines,after they form a closed figure, simply like a rectangle, they furthermore become a surface and the program fills in this surface which means you can p/p. if you delete this surface you can not p/p it anymore.

Thank you I discoverd this after some frustrating times also I had my gometry as a group. Thank so much.