When a MIDI track's output is routed to a plug-in MIDI input (i.e. Virus...

When a MIDI track's output is routed to a plug-in MIDI input (i.e. Virus or Bruno/Reso), making the plugin or its track inactive will cause the MIDI track's output to be set to None. in Pro Tools 6.0

This is a known issue in Pro Tools 6.0. After making the plug-in active, make sure to reassign the MIDI track output.

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