Messages in the Editor view.
The Messages window in the Editor view displays any error messages that have been generated for your documents. Error messages are generated during processes such as verification and may also be generated for other reasons, when you are opening or saving a document, for example.
You can display the window by clicking the Messages tab name or selecting View tab > Information group > Messages in the Editor view.
Errors from verification can occur when you confirm a segment or when you verify the active document by selecting Review tab > Quality Assurance group > 
Verify. If there are any errors for the segment, an icon is displayed in the segment status column. The different icons show the severity of the error message and indicate that there is a message in the Messages window.