[ddots-l] problem with midi

Hi
I have a problem, I want to save only 1 track, but in midi. When I  choose 
"save as" and choose midi format 0, jaws says " the project contain also audio".
When I choose yes the midi plays not only this track which i selected, but also 
all tracks. Where is the problem? How to save and export only 1 track to midi? 
Maybe something with settings of the midi channels?
Best regards.
Ralf.

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