Duplicate Part Designators
This compiler hint will appear when at least two parts across source schematic sheets in a design have the same designator associated to them. The message is displayed in the Messages panel in the following format:
Duplicate Component Designators
PartDesignator at
Location1 and
Location2,
where
PartDesignator is the offending designator
Location1 is the X,Y coordinates marking the center of the parent part for the first instance of the offending designator
Location2 is the X,Y coordinates marking the center of the parent part for the second instance of the offending designator.
Default Report Mode
Error
Recommendation
Assign different and unique designators to the duplicates as required. This can be done manually, by editing each offending designator, or through use of the Annotate dialog (Tools » Annotate). A number of additional annotation-related commands are also available from the main Tools menu in the Schematic Editor.