This is an old thread but I'll be installing a different soundcard this weekend to see if I have better luck with the problem project.  I found an RME Hammerfall HDSP 9652 on Ebay and picked it up on the cheap.  I'll post back here whether SONAR will play nicely with the Waves, Slate and UAD2 plugins in that project for anyone who may be interested.   The project is finished but it will be nice to know for sure that the Dakota was the issue.

The thread may be old, but I bet some of us are much older.  I certainly am.
 
I would LOVE to know if your alternate interface does the trick.
 
Bob Bone

I have a spanking new Octacapture and the other day I had a session-destroying time with a guitarist because X2 kept crashing the living daylights out of things. I tried a billion workarounds and even started pulling up DAWs I don't use for audio much anymore (Reaper, Vegas, ACID...) and for various reasons could not get anything happening. Finally, after he had put his stuff away and was getting ready to leave, I pulled up X1 and the session went flawlessly. Same VSTs on every platform.
 
X2 was 64-bit, X1 is 32. I'm not saying that's what it is but let me tell you sometimes the problem is just not knowable and very frustrating unless you painstakingly choose and burn in every single piece of gear and plugin you use and keep the rig very streamlined. I don't know about the zietgiest of plugins, but I'm returning to a "less is very much more" philosophy and trying to remove anything I don't use all the time to a small and tight rig.

Some 32-bit plugins really have a hard time dealing with 64-bit processing with Bit Bridge in Sonar, and that varies between X1 and X2, as slight differences expose issues with code with some plugins.
 
If I ever have to use 32-bit plugins, I do the project in 32-bit Sonar, but I have made a deliberate choice to PRIMARILY work with everything 64-bit in 64-bit X2a, and I have ZERO problems.
 
Bob Bone

"I'm returning to a "less is very much more" philosophy"
 
+1

Just wanted to mention for the sake of people who stumble onto this thread that I don't use 32 bit plugins in my x64 based machine when I am using any of my four DAW software programs.  I don't trust any brand of bridging software, period.

I'm having good luck with my 64 bit system using the same approach.
 
best regards,
mike

You didn't say how much RAM you have. Makes a difference if you're using a lot of plugs.

daveny5
You didn't say how much RAM you have. Makes a difference if you're using a lot of plugs.

4GB DDR2 800 (PC2 6400)

Dave you should have a minimum 8 GB for a 64 bit system.  4 GB isn't enough.
 
You will need to get matched modules too. Unless you can be 100 % sure that any add on RAM will be identical to what you already have. This means not just the same brand but the same date of manufacture as well as the same type. Its best to simply replace it all to up the amount.