Network Management

"An error has occurred" displays in the All Alerts this object can trigger resource

This article addresses an issue that displays an error in the All Alerts this object can trigger resource. Error: An error has occurred.

First published date

10/23/2018 2:54 PM

Last published date

2/24/2025 11:17 PM

Overview

When you open the Orion Web Console and view the All Alerts this Object can trigger a widget in the Node Summary page, the widget displays the following error message:

Product section

Orion Platform

Cause

When you configure the Trigger Conditions for the alert, the alert has a blank value.  This is usually caused by importing an alert from another system or incorrect/blank trigger conditions for the alerts. It can also be caused by references to deleted custom properties.



In the CoreBusinessLayer.log (C:\ProgramData\SolarWinds\Logs\Orion), you can find errors such as below.

ERROR SolarWinds.Orion.Core.Alerting.Plugins.Conditions.Dynamic.ExprTreeTransientRemover - (null) Expression Orion.NPM.Interfaces|PercentUtil|CCMMonitoring.NPMinterfaces of type Field cannot be connected with existing Field

ERROR SolarWinds.Orion.Core.Common.MessageUtilities - (null) Exception caught in method ProvideFault System.AggregateException: One or more errors occurred. ---> System.Data.InvalidExpressionException: Expression can not be converted to Field

Resolution

  • Review all enabled alert configurations and check if there are any blank trigger conditions from recently imported alerts.
  • This can also be caused by recently deleted custom properties being referenced in alerts.
  • Edit the alert with the correct values.
  • Delete the alert if it's no longer needed.