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ILX: could not obtain service. invoked from within "ILX:


HI everyone,


I'm playing around with ILX and trying to send a SMS text message everytime a user logs into my device (on a particular URL) - for this I've used the Twilio example, but the .js file doesn't kick off at all: in the logs I have:


Rule /Common/plugin_twilio/irule_twilio <ACCESS_POLICY_AGENT_EVENT>: sendMessage failed for user:, ILX failure: ILX: could not obtain service. invoked from within "ILX::call $rpc_handle sendMessage $username $telephoneNumber $sender "



The call in my iRule:

set rpc_handle [ ILX::init plugin_twilio extension_twilio]

    if {[ catch { ILX::call $rpc_handle sendMessage $username $telephoneNumber $sender } result ] } {




my index.js obviously has that method:


// Import the f5-nodejs module.

var f5 = require('f5-nodejs');


// Create a new rpc server for listening to TCL iRule calls.

var ILX = new f5.ILXServer();


const accountSid = 'somethingsecret'; // Your Account SID from

const authToken = 'andmoresecret';  // Your Auth Token from

const client = require('twilio')(accountSid, authToken);


ILX.addMethod('sendMessage', function(req, res) {

  console.log('Method Invoked, Arguments:', objArgs.params());

  var username = req.params()[0];

  var telephoneNumber = req.params()[1];

  var sender = req.params()[2];

  var message = username + ' logged in to F5';



    body: message,

    to: telephoneNumber, // Text this number

    from: sender // From a valid Twilio number


  .then(message => console.log(message.sid));





Any ideas?


F5 Employee
F5 Employee

From "<ACCESS_POLICY_AGENT_EVENT>" in the error message, I suspect K54205668: iRules LX is not compatible with ASM/APM policies. Remove the policies (if you can) and try again. As far as I know, the twilio NPM package should work with iRules LX.