How to get Localizable String from Object Event

Hi Bpm'online Community,

I'm new to bpm'online and I'm trying to validate an object on the Saving - Validate event. I added the event and I'm able to write the logic that throws an exception if the validation fails. Now, I want to get the exception message from the LocalizableStrings structure on the event.

I added a new localizable string schema but I cannot how to get it from the script.

This is the code of the script:

var cfrStageId = Entity.GetTypedColumnValue("UsrCfrStageId");

var errorMessage = string.Empty;

if (!cfrStageId.ToString().Equals(UsrCfrConstants.Initiation, StringComparison.OrdinalIgnoreCase)) {

 var numberOfBeneficiaries = Entity.GetTypedColumnValue("UsrNumberOfBeneficiaries");

 if (numberOfBeneficiaries < 1) {

  //errorMessage = new LocalizableString(Storage, Schema.GetResourceManagerName(),

          //                          "LocalizableStrings.NumberOfBeneficiariesNotPositive.Value").ToString();

        errorMessage = "The number of beneficiaries must be > 0";

  throw new Exception(errorMessage);

 }

}

return true;

The commented out code is what is not working. I also tried "UsrCfrEventsProcess" as the resource manager name but it did not work either.

I'd appreciated any help you can provide.

Thanks,

Jose