Sonar X3 Producer with weirds vertical lines during performance!!!

Hi Sonar friends,
 
While I am doing some rehearsals for my next performance, strange verticals lines appeared on my screen! I think there must be something with the Staff view since I need to have it open in order to read the staff.
 
I will try to attach a printscreen of the issue above.
 
I think there is something with the opened staff view and some Vsti interferences.
 
http://postimg.org/image/f4l0jcnf7/
 
Any help?
 
Thank you very much.