Cannot erase an extrusion

[KarolR]

I want to erase the third round extrusion.

I edit the sketch and try to erase the circle that is under constrained, but get an error message, why?

I deleted the vertical constraint that it had, and the dimension that was there, but it still say there is some constraint interfering

Gears base.ipt

[JD Mather]

This one is simple.

You are getting the error because Inventor can no longer find the circle to complete the original Extruded feature as it was.

Simply delete circle and exit the sketch accepting the error.

Edit the Extruded feature (you don't have to actually do anything, other then Edit Feature and then OK).

Inventor will update the feature and remove the error.

[KarolR]

I do as you say, erase, accept and edit, but then the dialog box of Edit doesn't have the OK button.

Sorry, i had to select the circles, it works