Im in the process of migrating a lot of FMOD events to a new project for… reasons 
When i copy and paste events from the old project to the new project (both of which have the same bank and mixer hierarchies) the banks migrate fine, but the mixer groups arent retained which takes a lot of time to redo.
Is there any way that i could achieve this, or automate this process?
Have you tried copying your project’s buses and pasting them into the new project before copying and pasting the events across?
When FMOD Studio pastes an event into a project, it checks for a bus with the same name and routing path as the bus the event was routed into in the original project, and routes the pasted event into that bus if one is present. Thus, if you copy and paste your buses across before copying and pasting your events, the routing should all be set up automatically.
That’s great to know, thanks!
This helped me solve what was going wrong which was that a new parent bus had been added in the new project - so i added that back into the old project and the reexported the events and it worked.