Altium NEXUS Documentation

WorkspaceManager_Err-UndesignatedPartsRequiringAnnotationUndesignated Parts Requiring Annotation_AD

Created: August 3, 2021 | Updated: August 3, 2021
This documentation page references Altium NEXUS/NEXUS Client (part of the deployed NEXUS solution), which has been discontinued. All your PCB design, data management and collaboration needs can now be delivered by Altium Designer (with Altium Designer Enterprise Subscription) and a connected Altium 365 Workspace. Check out the FAQs page for more information.
All Contents

Parent category: Violations Associated with Components

Default report mode:


This violation occurs when a component in the design is found to have a default designator (with a ? suffix), i.e. either it has yet to be annotated or the designator has been reset.


If compiler errors and warnings are enabled for display on the schematic (enabled on the Schematic - Compiler page of the Preferences dialog), an offending object will display a colored squiggle beneath it. Hovering over the object will display a pop-up hint that summarizes the violation. A notification is also displayed in the Messages panel in the following format:

Un-Designated Part <PartDesignator>


  • PartDesignator is the default designator for the un-designated part (e.g. U?, D?, C?, etc).

Recommendation for Resolution

Assign a unique designator to the offending component as required. This can be done manually by editing the designator or through use of the Annotate dialog (Tools » Annotation » Annotate Schematics).

Alternatively, use the Tools » Annotation » Annotate Schematics Quietly command to annotate without launching the Annotate dialog.


  1. Only one error instance will be listed in the Messages panel for each distinct designator type (U?, D?, C?, etc.). Multiple errors may exist.
  2. Object hints will only appear provided the Enable Connectivity Insight option is enabled on the System - Design Insight page of the Preferences dialog. Use the controls associated with the Object Hints entry in the Connectivity Insight Options region of the page to determine the launch style for such hints (Mouse Hover and/or Alt+Double Click). 


Found an issue with this document? Highlight the area, then use Ctrl+Enter to report it.

Contact Us

Contact our corporate or local offices directly.

We're sorry to hear the article wasn't helpful to you.
Could you take a moment to tell us why?
200 characters remaining
You are reporting an issue with the following selected text
and/or image within the active document: