Querying in Mobile Application

Hi Team,
I am currently working on creatio mobile app and trying to get the list of roles that are being tagged to the current user in addBusinessRule.But I am not able to get it using Terrasoft.store.BaseStore.
I tried using Try catch block , the error message is empty. Can you please help me regarding this?

Terrasoft.sdk.Model.addBusinessRule("Activity", {
    name: "FieldForceActivityTypeRule",
    ruleType: Terrasoft.RuleTypes.Custom,
    triggeredByColumns: ["Type"],
    events: [Terrasoft.BusinessRuleEvents.Load],
    executeFn: function(record, rule, column, customData, callbackConfig, event) {
     var currentUser = Terrasoft.CurrentUserInfo.userId; 
      alert("currentUser: "+ currentUser);
    var modelName = "SysUserInRole";
    var store = Ext.create("Terrasoft.store.BaseStore", {
      model: modelName
    });
    var columns = ["SysRole", "SysUser"];
    var queryConfig = Ext.create("Terrasoft.QueryConfig", {
      modelName: modelName,
      columns: columns
    });
    var filtersConfig = {
      property: "SysUser",
      value: currentUser
    };
    store.setPageSize(Terrasoft.AllRecords);
    store.loadPage(1, {
      isCancelable: true,
      filters: Ext.create("Terrasoft.Filter", filtersConfig),
      queryConfig: queryConfig,
      callback: function(loadedRecords, operation, success) {
        if (success) {
          alert("success :"+ loadedRecords.length);
          for (var i = 0, ln = loadedRecords.length; i < ln; i++) {
            var record = loadedRecords[i];
            alert("i "+ record);
          }
        }
      },
      scope: this
    });
        Ext.callback(callbackConfig.success, callbackConfig.scope, [true]);
    }
});