Missing Plug-ins
Possible causes of missing plug-ins:
You removed an external device from the Audio Connections window although it is used in a saved project.
You transferred a project to another computer on which the external device is not defined.
You opened a project that was created with an earlier version of Nuendo.
In the Audio Connections window, the broken connection to the external device is indicated by an icon in the Bus Name column.
To reestablish the broken connection to the external device, right-click the entry for the device in the Bus Name column and select Connect External Effect.
Note
Busses that are set up for external instruments or external effects are saved globally, that is, for your particular computer setup.