I just purchased the abbey road collection and when I try to insert the tg12345 mastering plug(and the meter bridge, also)
into a track in Studio 1 it will try to load , the waves icon spins around, but the plug doesnt show up.
 
IF I insert the studo rack into the track first then load mastering into a slot it shows up and works..
\
I dont read anything about rack only use.
 

I had the same problem in Studio One.The initial fix was to disable Rewire—which worked. The ultimate fix for me though (so I could still use Rewire) was to delete all versions of Notion from the computer, other than the most current version of Notion 6. This includes deletion of Progression, an earlier simpler version of Notion. Presonus and Waves are aware of this issue.

LAGinz25
I had the same problem in Studio One.The initial fix was to disable Rewire—which worked. The ultimate fix for me though (so I could still use Rewire) was to delete all versions of Notion from the computer, other than the most current version of Notion 6. This includes deletion of Progression, an earlier simpler version of Notion. Presonus and Waves are aware of this issue.

Interesting. since my system is the same, with versions of Notion and Progression..
 
I will try those steps
 
thank you