|Draft -> Utilities -> Heal|
Because of the fast evolution of FreeCAD, some object definitions might change over time and between versions, causing some Draft objects found in older files to not load properly or contain errors when opened with a more recent version of FreeCAD. This command tries to fix those bad objects by recreating a new one from scratch, then copying the contents of the properties from the old one to the new one. It can be run with objects selected, in which case it will only look at the selected objects, or with no object selected. All the objects of the current document will then be scanned for errors. If no error is found, this command will do nothing.
This command can only heal Draft objects.