Hello Everyone,
 
Facing this problem all of a sudden from nowhere. Not able to freely and selectively (by highlighting) copy/drag/move/delete portions of a midi track. Two notes have to be highlighted for any editing and even then unwanted adjoining areas of the track gets affected and neither the wanted portion gets copied/deleted.

Anyone knows where the controls are to treat this problem? I tried @ Preferences/Editing.
 
Thanks and Regards,
Kane

Is it possible you accidentally locked the clip? Check in the inspector. Also, post a screenshot if you're able.

Are you editing a groove clip or linked clips? The corners will be rounded if it's a groove clip. Linked clips a dotted border.

Clip Lock - No
Groove Clip - No
 
Below is a screenshot. The shaded part in the first pic is the area I wanted to separate but what I got is in the second pic as the second clip (the bottom two long notes are missing). Similarly, if say I want to separate the third note (8 to 10) or any part of it, it does not get copied unless I choose/highlight some part of the 2nd or 4th note. And with the same end result that the new moved clip does not contain the two long notes which consisted in the original clip. Thanks.
 
Sorry, the pic did not come up. Attach Images/Gallery Upload/Select an option and then nothing !!

Is it just one project/clip or all projects?

Hello Karl,
 
The issue is prevalent across projects/clips. Earlier highlighting/dragging/moving of any portion of a clip in its entirety was possible. But now as I said above only the whole note gets moved (which is kind of okay) and notes (usually the bass notes) which has a starting point earlier than the highlighted area does not get copied/moved in the new clip (a little issue here because I have to record it again for the new clip).
 
I have a screenshot but upload options are not showing up.
 
Regards,
Kane

A few questions to clarify the problem.
 
Is the problem in track view, PRV, or both?
Can you select just the area you want or is it selecting areas you don't? (That would indicate snap settings are playing a part)
Are you using the smart tool for selection?

Hi Audiomyth,   To post pics you need to upload to a photo sharing service such as Photobucket and then go to inserting the pic into the Sonar forums.
 
Hope this helps.

Try it on piano view as well as INLINE piano view I suggest.

Just a thought do you have 
Preferences > Customisation > Non-destructive midi editing.  Ticked?