Use caution when editing geometry tolerances

Source:
VX Technical Support, VX CAD/CAM

Modifying the geometry tolerance may cause a history regeneration to fail. It is recommended that you perform a history regen after modifying the geometry tolerance. If the change in tolerance causes the regen to fail, you can undo the change. If you regenerate later, a failure may be more difficult to locate and correct.

See also: Choosing a Geometry Tolerance