Check if SONOS queue is empty

[david.rombaut@gmail.com]

Hello Erwin, first of all many thanks for looking into my question.
I tried the code you provided but something seems to be going wrong. I may be doing something wrong but I cannot seem to figure out exactly what.
Attached a screenshot of the error log + your code in the background. Apparently is goes wrong at line 74.

Any ideas what the cause of this might be?

Many thanks,
David