Some third party plugins not automate-able

[Yiz]

Can I not automate the parameters of some vsts? On other vsts they work fine. I was trying to automate the pitch but it just wont work.

[Nigel Mackay]

Not all VSTs can be automated. Look at top-right corner of VST GUI - The R and W are for Read and Write automation.
This one can be automated.

 

This one can't.

Also, sometimes you need to make the VST write some automation before it becomes available in the list.

[Yiz]

Oh ok thx