Hi Studio Sixty Four,
I hope I can get it from the image, a scene file is normally the best way to communicate.
If a point has 100% from one joint, then nothing else has (nor should have) typically any influence on that specific point. With the Auto Normalizer on, as well as a 100% Subtraction as setting, the algorithm has no idea what to do, as nothing else had any influence before, so, where to place it.
Switch the Auto Normalizer off and try again.( If that doesn’t work, check the Selection. If nothing else works, just try the Visible option, which I would exclude, but just in case.)
As I try to check everything with the current release, here is a screen-capture, as I had no file, I hope this showcases it. (Screen-capture #400)
https://www.amazon.com/clouddrive/share/Fsh8YBRViRSLQKSQdWJZzOAWsXGAyPyZ10IMmAuQDWT
It’s just a sketch.
More about it, here:
https://help.maxon.net/us/#OWEIGHTMGR-ID_CA_WEIGHT_MGR_FUNCTION_GROUP
In other words, you might be able to add for a different joint weight, while the Auto Normalizer is on. It will take that from the points that had 100% before.
I try to showcase this here, while per point has 100% from one joint, subtraction is impossible, with Auto Normalizer. After adding a little amount from another Joint, Subtract works, with Auto Normalizer active.
https://www.amazon.com/clouddrive/share/auRcJeihmwTimRqhi9Ixpefwp0XxHQUHJW6ESxm9Zsh
My best wishes