Unused Sub-Part in Component

This compiler hint appears when a part of a multi-part component instance has not been used within the design. For example, three out of four parts for an instance of a 74HC32 component may have been placed and wired and the fourth has not. The message is displayed in the Messages panel in the following format:

Component Identifier has unused sub-part (PartNumber),

where

Identifier is the parent component, represented using the format Designator Library Reference (e.g. U11 74HC32)

PartNumber is an integer used to indicate which specific part is not being used (e.g. 1 represents part A, 2 represents part B, and so on).

Default Report Mode

Warning

Recommendation

Place the unused part and connect its inputs to ground. To ensure the same root designator, simply copy an existing part for that component's instance and, after pasting, increment its part number accordingly.