The incompatibility is with other brands too (Plugin Alliance,Surfer EQ and others) but  i've found a workaround.Inserting after the UAD a plug without issues (Cakewalk Channel Tool for example) you are able to insert Waves,Plugin Audio and other plugs that crash before with no problems,but take in mind  do not try to remove or disable the Cakewalk Channel Tool from the fx bin (disable/bypass it from the GUI clicking on POWER) or you got the same annoying crash.  
  You must put another instance of Cakewalk Channel Tools if you wanna insert another UAD even if you got that advice : https://dl.dropbox.com/u/..211/UAD_LAtency_ADD.JPG
otherwise you got crash!

The incompatibility is with other brands too (Plugin Alliance,Surfer EQ and others) but  i've found a workaround.Inserting after the UAD a plug without issues (Cakewalk Channel Tool for example) you are able to insert Waves,Plugin Audio and other plugs that crash before with no problems,but take in mind  do not try to remove or disable the Cakewalk Channel Tool from the fx bin (disable/bypass it from the GUI clicking on POWER) or you got the same annoying crash.     You must put another instance of Cakewalk Channel Tools if you wanna insert another UAD even if you got that advice : https://dl.dropbox.com/u/..211/UAD_LAtency_ADD.JPG otherwise you got crash!

I have no doubt you are having issues, but I have been using the X2 x64 demo with lot's of UAD-2, Cakewalk and other third party FX with no issues whatsoever. I am using all x64 plug-ins mind you (no Cakewalk bitbridge or third party bridges, I don't use them for performance reasons) and the latest x64 versions of each. I don't use any Waves however......

Hi KWILD,
Sorry to hear you're having problems. I just gave this a try and it seems to work OK for me:





You may want to give support a call.


Dean

  Hi Dean , please can you post your Sonar configuration file?That's mine : 

[Aud]
DataDir=X:\Wavedata
PictureDir=X:\PCACHE
PicCacheMB=500
PicCacheZoom=128
PicCacheLevels=2
EnablePicCacheThreads=1
ComputePicturesWhilePlaying=1
CopyOnImport=1
ReadCache=0
WriteCache=0
EnableCacheWriteThru=1
VolMethod=1
PanMethod=1
DiskBufSize=256
DiskRecBufSize=256
ExtraDiskBuffers=2
DitherAlgorithm=0
ZeroFillMethod=2
RecordPreAllocSeconds=0
ZeroFillDB=300
FlushWriteBeforeRead=0
FlushMultiple=1
DefaultEqPosition=0
DefaultAudSnapOfflineStretchMethod=3
DefaultAudSnapOnlineStretchMethod=1
RadiusStretchingPitchCoherence=50
RadiusStretchingPhaseCoherence=50
RealtimePreroll=0
SuspendPluginsOnBounce=1
[Wave]
DefaultSampleRate=44100
DriverID=0
WaveInID=3
OpenInputFirst=0
SmpteMode=1
TimingOffsetMsec=0,000000
TimingOffsetBuffers=0
LatencyMsec=11
BounceBufSizeMsec=0
FlushOnStop=1
ThreadSchedulingModel=2
EnableMixThreads=1
MixThreadCount=0
EnableSetThreadIdealProcessor=1
CSUseSpin=1
AllowOfflineRenderMixThreads=1
UseMMCSS=1
MMCSSThreadPriority=2
MMCSSTaskKey=Pro Audio
FreeMemOnUnload=1
AlwaysOpenAllDevices=0
MinimizeDriverStateChanges=1
RemoveDCOffset=0
EnableAsioBufferSwitchTimeInfo=1
EnableDeviceOutputLatencyCompensation=1
UseHardwareSamplePosition=1
BitsPerSample=24
FileBitDepth=24
RenderBitDepth=32
ImportBitDepth=0
ExtraPluginBufs=0
MixDezipperUsec=50
GapDezipperUsec=500
WaveInBuffers=8
WaveOutBuffersMME=4
WaveOutBuffersKS=2
MeterFrameSizeMS=40
SyncMaxDriftMsec=2
SyncDivisor=8
ProfiledMME=0
ProfiledKS=1
ProfiledWASAPI=0
UseWDMDmaForWASAPI=1
LinkSendPan=0
LinkPFSendMute=0
StopOnEmptyPlayQueue=0
KsUseInputEvent=0
WaveOutExtraBuffers=1
AutomationDecimationMsec=50
EnableSSEMixing=1
ThumbnailCacheSize=100
ManageASIOThreadPriority=1
EnableLiveADCRecalc=1
UseAlias=1
DropoutMsec=250
StartFadeMsec=1
StopFadeMsec=1
PanLaw=0
PanLawCompatMode=0
DisableIMDuringPlay=0
ShowMultiChannelInputs=1
ShowMultiChannelOutputs=1
[RME HDSPe AIO (9 in, 14 out)]
MigratedDMA=1
Name=AIO Analog (1+2)
InputLatencyOffset=0
UseAsioReportedLatency=1
WidePacking=4
Interleave=2
Use24BitExtensible=1
UseExtensibleForMultiChannelIO=1

Nothing to do i've try it all to fix but every time i add another plugin after a UAD (even a second UAD plug too) i got a crash.
Only very few plugins seem to stay well with UAD's (Cakewalk Channel Tool is one of that as i've already say posts ago).
I must roll back to UAD 6.3 and use the old same bridge.
Now is working fine,of course...

 I didn't read what UAD cards you have but only one UAD plug-in loading has a familiar ring to it. Your UAD cards don't happen to be UAD-1 are they?

Uad-1?LOL , c'mon im not that dumb!I have a UAD 2 solo and a UAD 2 DUO.

After weeks that i was using UAD 6.3 i've try to reinstall 6.4 and i've found some clues. 
Im a Novation Automap user (SL61MK2 with Zero SL) the crashes are caused by Automaped UAD plugs!
Deleted the automap wrapped files and crashes are gone!
Sonar seems to had a bad compatibility with some other automap plugs.Some seems to work well alone but when you mix togheter different automaped plugs from different brands you got crashes,freezes and headaches!!!!
Anyway i can say for sure that Automap 4.6 with UAD 6.4 (X64) crashes Sonar X2 and X2a every time you insert more than one automapped/UAD plug-in.

I ran into the same issue attempting to use Vocal Rider with UAD2 plugs. System crash every time. I stopped using vocal rider as it does not function correctly in Sonar anyway. This is  documented both on the Waves site and has been discussed here as well.

  Vocal Rider seems working good for me.All my problems were caused by the novation automap,after removing the automapped versions of my vst plugs all my crashes are gone completely!The major issue was with UAD x64 plugs but automap seems making weird stuff with a lot of other plugins as i've already say,sometimes all seem to work well but when you add multiple type/differend brand of automapped plugs the Sonar projects becames corrupted and you got all kinds of crashes. 
I was able to re-open a lot of projects that crashes soon after opening just removing the automapped plugs (an so loading the NON automapped versions of the same plug).
Really disappointed about that...