========================================================================== Intercurve fillet uses endpoint constraints for improved accuracy, but before this commit was only considering a coincident constraint. Now it also considers an endpoint tangency or perpendicular. delConstraintOnPoint with coincidentonly=false, was not checking endpoint perpendiculars and would therefore fail to delete them. https://forum.freecadweb.org/viewtopic.php?f=3&t=31594&start=30#p265731