Best Of

There have been requests in the past to make chamfers more robust in general. This case here appears to be only one example. Just yesterday have I had an issue with chamfers not resolving after a change in geometry, even though the very area where it would create said Parasolids issue was not actually part of the model, because another piece of the solid took that place, and the edges involved would never actually meet. But since it is not uncommon (also with other software), I worked around it by modifying the model history. That would, however, mean that if - for any reason - someone wanted to change the geometry again, it could be necessary to modify model history again. That is not the spirit of a feature driven modeling approach. So, even if Aidan's case is one of a kind, the underlaying issue of chamfers failing whenever their edges meet (even if it was in a distance that is no longer part of the model at the time of editing), is still generally important. It appears direct editing modellers have less or no issues with this case.

@aidan_fraser the reason we don't do it is because Parasolid does not allow it. Thanks for the improvement request. This is the first time anyone has asked for this capability, so until it has been reviewed and implemented it might be quicker to create a custom feature if you need this every day.