I have a big project which is about 45 minutes and obviously with lots of tracks,about 120 tracks. I froze most of the tracks to let the cpu works smoother. couple days ago i decided to add some strings and I opened new Kontakt 5 and load spitfire BML(violin and cello). I recorded some midi and every thing was fine and normal. I saved it and shutdown my PC. Next day I tried to load my project but as soon it loads, user account control pops up and says :
Program name : Fault Reporter.exe
Published: Unknown
File Origin: Hard drive on this computer
Program location: "c:\program files\ cakewalk\ shared utilities \............
and gives me and yes and no option.
after I press yes another error message pops up. It says SONARPLT.exe has stopped working and forces me to close the program.
I backed to the previews save before adding Kontakt, sonar started to work with no problem. 
I have the latest version of Kontakt and my pc is updated. It doesn't show this behaviour with new project.
I really appreciate any help you can provide.
 
 

try holding down shift and starting sonar. that will let you know if a plug in is causing the issue.
you can always try re personalizing sonar as well if safe mode doesn't work.
Hold CTRL and open sonar. click yes to personalize sonar.
see if that solves your issue.

Thanks for you r reply. I tried both. Not working. Still get the error .
As I mentioned before if I delete the Kontakt, It will work. I don't understand whats going on. I have used Kontakt in this project with no problem. I don't know why it shows error now.

There is some thing I should add: I bought a SSD hard drive and moved some of my BML library to it to get more speed to load and read them. This behaviour happened after that. I am going to move them back to the old hard drive again and see what happened . I will report it as soon as i move them back.

Ok I moved all the BML Library from new SSD to The Old hard drive. Problem solved but it takes time to load my vst because it is so heavy. Thats why i bought a SSD hard drive.
Still I don't understand why adding SSD hard drive cause this issue? 
My C DRIVE is SSD too but never had this problem. The new one i bought is just for my vet's Library.
Any Help?
 

what kind of hard drive is the new SSD ?
who is it made by ? where did you get it ?
 
I ask because of bought some less than stellar SSD's (bargin type brand) thinking an SSD is an SSD.
how ever, I have had better results with a name brand like PNNY or Crucial.
 
what brand is your C drive as well ? (your other SSD)

c drive is kingston and the new one is ADATA 480gb

i got it from NCIX


 

Are you by any chance using the vst3 flavor of SPAN?
 

I am using BML from spitfire audio which loads in Kontakt 5