N/error Module
UserEventError.type
Property Description: Error types. Use values defined in error.Type.
Type: string (read-only)
Supported Script Types: User event scripts For more information, see SuiteScript 2.0 Script Types.
Module: N/error Module
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=UserEventError.type

// Code Example 1

//Add additional code

//...

var UEcustom_error = error.create({

    name: 'MY_ERROR_CODE',

    message: 'my custom SuiteScriptError details',

    notifyOff: false

});

log.debug("Error Type: " + UEcustom_error.type); // 'Error Type: ' followed by the type will be logged

//...

//Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_159476205666.html