Missing Child Sheet For Sheet Symbol

Parent category: Violations Associated with Documents

Default report mode:


This violation occurs when the link between a sheet symbol and a target schematic sub-document is invalid. This can occur when:

  • A sheet symbol has been placed manually but no sub-level document reference has been entered into the symbol's Filename field.
  • The document reference in the symbol's Filename field has been entered incorrectly - effectively targeting a document that does not exist.
  • The referenced target document has been removed from the project or deleted.


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. A notification is also displayed in the Messages panel in the following format:

Missing child-sheet in <SymbolFileName> in Symbol <SymbolDesignator>,


SymbolFileName is the current entry for the parent sheet symbol's Filename field.

SymbolDesignator is the designator of the parent sheet symbol.

Recommendation for Resolution

Check the entry in the sheet symbol's Filename field. If the required target document already exists, ensure that the document name (including extension) is entered correctly into the field. If the target document has been removed from the project and you have access to it, add it back in to the project. If the target document does not exist, right-click on the symbol then choose the Create Sheet From Sheet Symbol command from the Sheet Symbol Actions sub-menu.


You are reporting an issue with the following selected text and/or image within the active document: