Richard Austin wrote:
is there any way to see what is indefined?
One way is, with the sketch open, right click and click on Fully Define Sketch.
Usually, when I think everything is fully defined, but the sketch thinks it isn't, there is some small line or point that I didn't plan on having. You can use the "Fully Define Sketch" command to find out what isn't defined. This isn't a command I use often, so I use the command search to find it. Start typing in the box and the command will come up.
As Carrie Ives said, you almost certainly have a small sketch entity that's not defined. You could use the "Fully Define Sketch" option, but that stray element may cause issues when the sketch is used for a feature. I'd suggest doing a click and drag box left to right at corners and the ends of lines and hit your Delete button on your keyboard. Repeat until the sketch shows fully defined. If that doesn't work, please attach your file here (How can I attach a file to a forum post?) so we can try to figure out the problem.