How to use Exec Binding to launch VLC with arguments

Add-ons Bindings
1

[SCENARIO]
I have a Raspberry PI 3 connected via Bluetooth to a an OontZ Angle 3. I cannot succeed in playing audio from OH to the OontZ but I can do it via command line (e.g. cvlc http://wwdc-fm.akacast.akamaistream.net/7/634/20131/v1/auth.akacast.akamaistream.net/wwdc-fm).
I thought of using Exec Binding to send a command to a script but it is not working :unamused:
Hereafter my config:
ITEMS:

Item String LVRStreamURL { channel="exec:command:LVRplay"}

THINGS:

Thing exec:command:LVRplay [command="bash /etc/openhab2/bash_scripts/vlctest.sh %2$s", autorun=true]

RULES:

var StreamURL =  "http://wwdc-fm.akacast.akamaistream.net/7/634/20131/v1/auth.akacast.akamaistream.net/wwdc-fm"

rule "Change LVR stream"
	when
		Item LVRRadio_Station received command
	then
		logInfo("STREAM","LVRRadio_Station received")
		if(receivedCommand == 1) executeCommandLine("bash /etc/openhab2/bash_scripts/vlctest.sh "+StreamURL) 
end

I see the item changing event:
[ItemStateChangedEvent ] - LVRAudioCtrl changed from 1 to 0
[ItemCommandEvent ] - Item ‘LVRAudioCtrl’ received command 1

But nothing happens :angry: