When the "Play a Sound" action generates an error, the log message appears to be missing a closing parenthesis:
Play sound, 'test'
Unable to play sound : [Please be sure a sound file exists at the specified location.] (test
This also occurs with the "Play a Random Sound" action:
21:09:48 - Unable to play sound : [The path is not of a legal form.] (
The above was the result of editing the .vap to make the path entirely blank, which in itself isn't relevant, I'm just showing it happens with other error messages too(both errors shown can occur for either action).
EDIT: Fixed in v1.6.4.5