Admins cannot open the same synced Realm twice

[kraenhansen]

This is the error printed to electrons stdout:

libc++abi.dylib: terminating with uncaught exception of type realm::MultipleSyncAgents: Multiple sync agents attempted to join the same session

From the sync channel on Slack:

Yavor Georgiev [3:25 PM]
that’s because you’re launching a second electron process that tries to attach a sync session to the same realm file on disk. multi-process sync is not supported right now

So this can probably be fixed by having the RealmBrowserContainer.tsx specify a different path for every synced realm that is opened, here: https://github.com/realm/realm-studio/blob/master/src/ui/realm-browser/RealmBrowserContainer.tsx#L116-L122

[bmunkholm]

Don't know if it could just be limited that you can only open the same realm once - if that's easier.