I have a problem from time to time with the dimension dialog box that pops up when you double click on a dimension in an assembly or part file. Sometimes it appears. Sometimes just a generic text box pops up. See the attached file. The text box can be edited, and the dimension will update properly, but none of the other features of the dialog box show up. There doesn't seem to be a pattern to when the text box pops up. Anybody else have this experience?