diff = moment - current_end
if diff < Rational (0):
- error_message (_ ('Negative skip %s') % diff)
+ error_message (_ ('Negative skip %s (from position %s to %s)') %
+ (diff, current_end, moment))
diff = Rational (0)
if diff > Rational (0) and not (self.ignore_skips and moment == 0):