Bring up the Preferences window by selecting menu item ‘Edit’->‘Preferences’.
Isolate sets are created by deciding which elements are considered equal in terms of their Lengths, (edges and struts); Areas (faces); or the angles between struts at a vertex (hubs). The precision settings that determine these equalities are of vital significance. Sometimes the reduction of a single decimal place can have significant results on the contents of an isolate set. Precision becomes more critical as the Frequency and/or Unit Radius Scale Factor is increased.