Altium NEXUS Documentation

WorkspaceManager_Err-ComponentsContainingDuplicateSubPartsComponents Containing Duplicate Sub-Parts_AD

Created: August 3, 2021 | Updated: August 3, 2021
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Parent category: Violations Associated with Components

Default report mode:


This violation occurs when the same part of a multi-part component instance has been placed more than once in a schematic design. For example, you have placed a 74HC32 component with designator U9, but have inadvertently placed two instances of part one of this component, resulting in two instances of U9A in the design.


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:

Component <ComponentName> has duplicate sub-parts at <Location1> and <Location2>


  • ComponentName is the name of the offending component in terms of its designator and library reference.
  • Location1 is the X,Y coordinates for the first instance of the particular sub-part.
  • Location2 is the X,Y coordinates for the duplicate instance of the particular sub-part.

Recommendation for Resolution

Change the part number for the offending parts as required, using the Increment Part Number command - available from the main Edit menu or from the Part Actions sub-menu (when right-clicking over the part). The advantage of launching the command from the Edit menu is that you remain in increment mode, allowing you to cycle through the part numbers until you reach the desired one.


  • 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). 
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