How can I create a diameter dimension in sketch mode?
I learned that you can create diameter dimensions in sketch mode by clicking back and forth between the symmetry line and the line that you want your dimension on for two times. However, in my case, it does not work, I get an error message:My sketch
The error message that I get.
Does somebody maybe know what is wrong, why this situation occured or what can be done about it to avoid it? Thanks for any replies!

