# Warnings and error icons on components

When a component is not correctly defined or if the link to the next component does not exist yet, a red checked circle or a warning sign is docked at the component icon.

Mouse over the component, to display the tooltip messages or warnings along with the label. This context-sensitive help informs you about any missing data or component status.

![Example of warnings and errors on a component in the design workspace.](https://help.qlik.com/talend/en-US/studio-user-guide/Resources/images/Warning_ErrorsIcon.png)