Problem to insert data into Stream

Hi All,

I have problem to insert a data into Stream from subscription.

In the following my step :

1) I built a service to insert data into stream

//
var tags = new Array();
var values_xx = Things["ThingStreamForTest"].CreateValues();
values_xx.ALARM = InputAlarm; // STRING
values_xx.DataOra = InputDate; //DATETIME
// location:LOCATION
var location = new Object();
location.latitude = 0;
location.longitude = 0;
location.elevation = 0;
location.units ="WGS84";
//
var params_xx = {
tags : tags,
timestamp : InputDate,
source : me.name,
values : values_xx,
location : location
};
// AddStreamEntry(tags:TAGS, timestamp:DATETIME, source:STRING("me.name"), values:INFOTABLE(TestDataStream), location:LOCATION):NOTHING
Things["ThingStreamForTest"].AddStreamEntry(params_xx);

2) I run thin service with input parameter and the data are insert into Stream (it Work)

3) If I call the service from subscription I received the following message

Execution error in service script [ThingofProcedure GestionePacketFromMqttBrokerToStreamNew] : Wrapped java.lang.NullPointerException Cause: null

I tried these steps on Thinworx 8.4 (Linux) and Thingworx 8.0.1 (Windows) bu I received the same error

Can anyone help me

Dimitri