Sometimes interpolation result made mistake in character outline.
This is most likely due to some strange curve at the original position.
Did you see something strange?
I have made some changes to the algorithm. The release can be downloaded from here:
https://www.high-logic.com/tmp/fontcreator/FontCreatorSetup15.0.0.2953-x64.exe
Can you try this release and let me know your results?
Much better, but there is little thing.
Yes, that looks way better. It is best to manually inspect all glyph outlines after performing this transform feature.
Do send the font project file to us, so we can see if we can further improve the algorithm.
I have been sent my project file privately.
Thank you. We will look into it.
It is not easy to further improve it, so for now you need to fix it manually.