Error field events

I use field events but I have a console error
Can anyone help me?
Thanks

Here is the code used

Client Before

var ctrlMATERIAL = ctrl.getPeer('MATERIAL');
var ctrlFURNIZOR = ctrl.getPeer('FURNIZOR');
params["MATERIAL"] = ctrlMATERIAL.getValue();
params["FURNIZOR"] = ctrlFURNIZOR.getValue();

Server

$result['PRET_MATERIAL'] = DBLookup("SELECT PRET FROM gen_materii_prime_pret WHERE MATER_PRIME='".$params["MATERIAL"]."' and DEN_FURNIZOR='".$params["FURNIZOR"]."'");

Client After

var ctlPRET_MATERIAL = ctrl.getPeer('PRET_MATERIAL'); 
ctlPRET_MATERIAL.setValue(result['PRET_MATERIAL']);

The error in the console is:

Uncaught TypeError: Cannot read property 'PRET_MATERIAL' of undefined
    at constructor.after (:8086/include/runnerJS/events/pageevents_client_add_etic_tip.js?8197_1609724437:19)
    at Object.success (:8086/include/runnerJS/events/pageevents_client_add_etic_tip.js?8197_1609724437:21)
    at j (loadfirst.js:1)
    at Object.fireWith [as resolveWith] (loadfirst.js:1)
    at x (loadfirst.js:1)
    at XMLHttpRequest.b (loadfirst.js:1)

PHPrunner version 10.4 / 36153 / x64