track disappeared...

[snow]

A track  disappeared suddenly...

I can hear the sound of it, and can see the data from the file, but just can't see or edit the track.

Can someone tell me how to fix it?

[Amberwolf]

There is a Track Manager that lets you hide and unhide tracks.   It should be available from the menus (probably views, but I don't know), and there is also a shortcut key to it, but it is probably different than the key I use for it (M).  

[Promidi]

Try SHIFT+H