table doesn't exist in my datasource , I'm using IRIS to connect to an external DSN, the tables from my DSN works but not the Ens.Util.LookupTable IRIS system table which I though by default it should recognize it.
 

Thanks 

It doesn't recognize the Next() method for some reason 

here is the code and query worked fine but it failed at Next()

Hi Robert,

here is how my code looks like but when I comes to line code :  Set WebSoc=##class(%Net.WebSocket.Client).%New(WebSocURL,cre,evl)

it just hangs and doesn't go any further!?

ClassMethod GetAdvData() As %String
{
    S Token=##class(SX3.Task.TemperatureCollection).GetAuth()
        S BleMac="DC:0D:30:00:07:25",GatewayMac="CC:1B:E0:E2:52:D4"  // this for testing
set cre=##class(SX3.Production.HTTP.AdvCredenials).%New()
set evl=##class(SX3.Production.HTTP.AdvListener).%New()
Set WebSocURL="https://ac1.mqtt.sx3ac.com/api/gap/nodes?filter_mac="_BleMac_"&filter_rssi=-75&mac="_GatewayMac_"&active=1&event=1&chip=1&access_token="_Token
Set WebSoc=##class(%Net.WebSocket.Client).%New(WebSocURL,cre,evl)

S res=WebSoc.Next(30,1)
Quit WebSoc_"|"_WebSocURL
}

Class SX3.Production.HTTP.AdvCredenials Extends (%RegisteredObject, %Net.WebSocket.ICredentials)
{
Method GetUsername() As %String
{
quit "SuperUser"
}
/// Returns the password to use for authentication with the web socket
/// @API.Overrideable
Method GetPassword() As %String
{
quit "SYS"
}
Method GetSSLConfiguration() As %String
{
q "RTLS"
} }
 

Class SX3.Production.HTTP.AdvListener Extends (%RegisteredObject, %Net.WebSocket.IEventListener)
{ Method OnMessage(pContent As %Stream.Object)
{
S ^data("message")="1" //pContent.Read()

} 
}

Also changed the listener class to include you code and still the same, hangs

Class SX3.Production.HTTP.AdvListener Extends (%RegisteredObject, %Net.WebSocket.IEventListener)
{ Method OnOpen()
{
if $increment(%ct("O")) set io=$io use 0 write "OPEN",! break:$get(%b) use io
} /// Called when an error occurs in the web socket connection.<br />
/// @API.Overrideable
Method OnError(pError As %Exception.AbstractException)
{
if $increment(%ct("E")) set io=$io use 0 write !
do $system.OBJ.DisplayError()
if pError.Code=28000 kill ws   use io quit     ;connection lost
zwrite pError write ! break:$get(%b) use io
} /// Called when the web socket connection is closed by either the client (%OnClose) or the server (by sending a close frame).<br />
/// @API.Overrideable
Method OnClose()
{
 if $increment(%ct("C")) set io=$io use 0 write "CLOSE",! BREAK:$get(%b) use io
} /// Called when the client receives a message from the server. <br />
/// <var>pContent</var> may be a binary or UTF8-decoded character stream. <br />
/// @API.Overrideable
Method OnMessage(pContent As %Stream.Object)
{
if $increment(%ct("M")) set io=$io use 0 write "MESSAGE:",pContent,!
if $isobject(pContent) write pContent.Read(),!
if $get(%b) zwrite pContent BREAK  
use io
} }
 

any clues?

Thanks