[Closed] Copy and paste single keyframes

I’m trying to use the AssignKey function in max script to copy a sequence of keys from place to another on the same Animation controller. I believe the method is to:

• use addnewkey at the new time position
• look up its index
• use assignKey to overwrite its value with the source key value.

Basically it doesn’t work

Addnewkey works but assignKey just deletes keys the new keys I’ve created

Is this a bug ?

Has anyone got this to work ?