Hi everyone,

Kind of new to the program and I need some help.  I've been trying to cut extrude a small piece out of a cylinder and can't seem to get it to work.  I've been able to get it to cut once but a circular pattern gives me a geometry build error.  Could anyway suggest anything or possibly even just do the simple operation for me? I need 6 instances of the cut through the outside ring.  The needed feature will be Cut-Extrude 12.  Thanks in advance!

The files are attached