entity could not be converted

Anyone ever ran into this problem? When I create a gearthrough gear trax I get this error when trying to dimension thechamfered edges. "The selected entity could not be converted into aline or a circular arc" If I go back to the part and suppress thefeature (tooth pattern) it lets me add the dimension, only toconvert back. For example if I have a 30 degree edge called out, itreverts to 150 or 210 upon unsupressing.???SolidworksDrawings And Detailing