[Closed] Saving values stored in CAs but NOT in parameter blocks

Is it not possible to update the value of a local variable that’s contained inside a custom attribute (but NOT inside a parameter block) and then have that new value saved with the file? When I try this, and then ropen the scene, the value is reset to whatever the default value is in the custom attribute.

Is it not possible to assign and save dynamic values inside a CA but outside a parameter block?

Thanks!