Warning in voice related rules

Simple rule:

rule "Lights"

when
Item VoiceCommand received command
then
    var String command = VoiceCommand.state.toString.toLowerCase
    logInfo("Voice.Rec","VoiceCommand received "+command)

    if (command.contains("christmas lights off")) {
        gXmas.sendCommand(OFF)}

    else if (command.contains("christmas lights on")) {
        gXmas.sendCommand(ON)}

    if (command.contains("all lights off")) {
        gLight.sendCommand(OFF)}

    else if (command.contains("all lights on")) {
        gLight.sendCommand(ON)}            

end

What’s wrong?

2017-12-27 00:15:06.076 [WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model 'voice.rules' is either empty or cannot be parsed correctly!

2017-12-27 00:15:08.416 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'voice.rules'

deleted message

Nothing. This error happens in the moment your editor saves the file through samba, nothing to worry about.