Interferences between Dynamic Modelling and Creo Elements/Direct Machining
If you are modifying a model with Dynamic Modelling functions, the Creo Elements/Direct Machining module will attempt to re-verify all Creo Elements/Direct Machining Features invalidated by the modification operation. Normally the feature is positively verified and nothing is lost at all or the feature is damaged in a way, that it cannot be validated anymore.
There is one exception introduced with CoCreate Modeling 2002+ to the rule above: If you move a hole with front and/or back chamfers as a recognized feature with the option extend_feature (now default), the chamfers will be recreated by the dynamic modelling operation but these recreated chamfers are no longer part of the Creo Elements/Direct Machining Feature. The Creo Elements/Direct Machining Module reacts upon this disconnection by shifting the start point of the feature and removal of the chamfers from the feature.
If you have a model which has been modified in the way mentioned above and you want to "heal" this "data-loss", you can do the following :
1. Inquire the chamfer(s) (e.g. use the measure functions or start a modify) to find out the parameters for the chamfer(s)
2. Remove the chamfers from the model
3. Modify the hole feature. You will have to re-specify the start position and the chamfer(s). As the chamfer(s) will have an angle of zero and a depth of zero, please start with the angle first because a chamfer with depth but angle zero is impossible.