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Invalid boundaries error message on an edge dissolve.
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Description

After downloading the blender-2.62-r44598-win32.zip from the blendbot , i quickly played around some edge dissolve and ran at some point into the following message : "Invalid boundaries region to join face" .

As it happens on a topology that do not seem that unreasonnable, maybe there's a problem there, so i submit the blend for you to be able to check if it is indeed a bug or if it is just something to be expected that i am not aware of, as i know extremely few on the technical aspect of the bmesh system that's always a possibility.

The error message appear when i select one of the 2 edges (displayed in the screenshot attached) , press X then select Dissolve.

If i go into Face selection mode , and select both the larger and the smaller ngon faces , then press X then Dissolve, the error message become "Could not create merged face".

Event Timeline

This is a setup that is not allowed, it would lead to a faces with more than one boundary (inner and outer of the circle), which bmesh can't handle currently. I think there has been some discussion about supporting this, but for now it's working as intended.

Brecht Van Lommel (brecht) changed the task status from Unknown Status to Unknown Status.Mar 12 2012, 2:50 PM