Hello,
I'm transferring my audio and midi tracks to a studio mixer who uses a different DAW then I do...Sonar.
My midi clips do not extend to the beginning and end of the song and the mixer wants all the tracks
of the song to extend from the beginning to the end of the song so that they are all the same length,
that way when he imports the tracks the parts all start at the right time.   I can do this with the audio tracks,
but the same process does not work with the midi tracks.   Anyone know how to do this with the midi tracks?
Thank You
 

Why not save the midi tracks as a midi file? When you friend opens it in another DAW all of the tracks will be in the right place. They can then import the full length audio tracks.
 
If you export the audio tracks as broadcast waves and your friends daw supports that format, they too can be imported into their correct locations without the need to extend over the entire track.

SOLUTION -
Just figured it out.   You have to extend the midi clip to the beginning and end of the song and then hit groove clip looping.  Done.

DreamReality
SOLUTION -
Just figured it out.   You have to extend the midi clip to the beginning and end of the song and then hit groove clip looping.  Done.

I'm confused as to how are you are exporting midi tacks that would make this necessary - but I guess if it's working for you well done:)

It's been previously reported that dragging a MIDI clip out of SONAR to export it does not preserve 'empty' space at the front of the clip (in the form of offset timestamps in the MIDI file) as it did in earlier releases. I don't recall offhand exactly when this broke in Platinum, but it worked as expected in X3. Enabling Groove Clip Looping is one workaround. Another is to insert a 'dummy' event like a CC64=0 (pedal up) at 1:01:000, which may be necessary if the MIDI clip exceeds the 256-beat limit (?) for Groove Clips.

brundlefly
It's been previously reported that dragging a MIDI clip out of SONAR to export it does not preserve 'empty' space at the front of the clip (in the form of offset timestamps in the MIDI file) as it did in earlier releases. I don't recall offhand exactly when this broke in Platinum, but it worked as expected in X3. Enabling Groove Clip Looping is one workaround. Another is to insert a 'dummy' event like a CC64=0 (pedal up) at 1:01:000, which may be necessary if the MIDI clip exceeds the 256-beat limit (?) for Groove Clips.

Ahh - got it. I don't drag to export so have never come accross this.
I must be missing something here though  as I still can't see how saving all midi tracks as a single file isn't the fastest and best way to achieve this though - unless that's broken too!

I agree, Just save it as a MIDI file and it "should" open on the correct place of a timeline, The midi file will also set the tempo map correctly. 
Audio tracks are easy to drag and drop. 
I have transferred plenty of songs into Cubase this way.