'Uncaught exception' when trying to access tracks

[Steltek]

When hitting the menu key and chosing tracks, I get:

'Uncaught exception: Application bbtracker (174) is not responding; process terminated'

And then am back to the BlackBerry? applications menu.

I guess one of the tracks on my card is the problem and I'll have to weed them out one by one. Is there a way to convert .bbt files to .gpx format without bbtracker itself?