When opening a specification the following message is displayed: “A reference source for this document could not be found”.

Screen-shot of 'A reference source for this document could not be found' error

More information

One of more of the sources on which this document is based could not be located. In the References view tab, you can see what sources your specification is using; those marked in Red are missing.

 Screen-shot of the References view


To rectify the problem:
  1. Click Ok to the message 
  2. Click on the Current Sources tab in the References view
  3. Right mouse click on the referenced specification highlighted in red, and select Properties from the menu
  4. Click on the Browse button adjacent to the Path text box and browse to the referenced specification
  5. The referenced specification should no longer be displayed in red in the References view.