Hello I am New to solidworksCAM so I have a few dumb questions.

I set up my tool crib to the tools I have. I need to drill a 7/8" hole and my largest drill bit is a 3/4" but I have a  1/8" flat end bit in my crib.(I do not want to bring in a new tool)  When I use extract machinable features it detects my holes but wont let me generate operation plans. I am not sure what is going on or how to make it work can you please help