The last session was probably the worst in my Sonar history with 8 crashes that required a reboot in less than one hour

Since I've gone from zero problems to zero productivity basically over night, I don't want to believe it's the PC. Something is wrong with that particular project as I had no stability issues the entire month before, since X2a was released (I reckon it as about 3 crashes total)

Hence, I decided to rebuild the project with creating templates, importing those to a new project and then dragging clips over ... hmmm, didn't get very far as the original project seems to be seriously screwed (crashes after save, after exporting OMF, when importing track templates which are functional in other projects, and most interestingly when freezing an IK soft synth)

I have not 100% identified the problem yet, but I have a strong su****ion that it's BitBridge that's causing all the troubles because in my working projects it was all audio tracks, 64 bit FX, 64 bit synths. This time I need the mellotron sounds that come with IK SampleTron and (I believe that) troubles started after introducing 3 instances of the 32 bit soft synth ... and there is no easy way out, either. The sounds are quite unique, there's no 64 bit version, I can't even freeze and remove temporarily (freezing causes crash) ...

Any suggestions / workarounds? Would J-Brigde be any better?

So now the crashing days are over  

The cause is identified: several instances of 32 bit IK soft synth and BitBridge

When moving each instance of it into a separate bitbridge server (which is a bit tedious to introduce at a later stage), Sonar became more stable already; project open and save problems were basically gone, but I still got crashes when freezing one of the 32 bit IK soft synths.

After installing jBridge, freeze also works, so does the previously crashing version of the project.