Hi,
I am a new user on Cwb. I had a similar issues when reopening a project -> no sound from any vst. Sometimes, only the first instance of the VST emits sound.
I found this on an other forum :http://forum.cakewalk.com/FindPost/3722478
It explains that a possible workaround is to insert a new instance of the VST and drag/drop the midi on the new track. I did that once but its really painful however to do so with 25+ tracks and readjusting mix settings.
I am not sure about how to solve this but what I did is to open a parallel new project and insert a new instance of one of the VSTs that I use in the initial project. Then I triggered midi input from the VST interface that has a virtual keyboard. That generated audio. I closed the new project and get back to the initial one and some of the VST tracks were working properly again but not the others (even with the similar plugin). The issue may be from the VSTs or the DAW unfortunately.
I think it is related to the outputs that Cwb is creating when adding an instrument (split or per-output), but at this point I am not sure.
I went on Cwb because the version of Cubase I used have a stupid limitation on number of instrument track
Cwb has good functionalities but somehow, there are many issues preventing me from having a peaceful workflow so far.
Any help on this will be appreciated!
