bandso
For some unknown reason I have seemed to have hit the lottery when it comes to having sonar work right. All of the versions, all of the patches, and all of the quick fix just seem to work properly with my little studio computer.
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Much the same here. X2 (with the hotfix but not with X2a patch) was running fine on my old Vista DAW (an "off the shelf" gaming PC from Mesh with the onboard sound disabled, initally an ESI Juli@ card, and later a Roland Quad Capture and a couple of extra disk drives), ok there were a few bugs and annoyances but nothing I could not work around with a minimal amount of effort, and no X2 crashes.
On the old DAW the only serious crashes I experienced in 4 years were down to a failing hard drive. Prior to getting a Roland Quad Capture my ESI Juli@ drivers would crash occasionally for example if I left the stand-alone version of Kontakt open and launched Sonar.
The new one is a custom build for DAW specialists Scan and so far the only real problem has been with IK Multimedia authorization manager, and no matter how hard you try you can't pin that one on Sonar.
X2A will have bugs, but there has been nothing that stops me working so far. I am certainly not seeing stability problems.
I think this is the experience of most users and I tend to think you have to be unlucky to get a unstable system, rather than luck to get a stable one.