Errors Errors
Errors in the GEDCOM are reported using Reports ⟶ Error Report ...

List of errors in the current GEDCOM file

List of GEDCOM Errors
(Click on the image to enlarge)
 Click    to refresh the table after apply fixes.
 Click    to view the original GEDCOM

 The first time the GEDCOM viewer window may open off screen. Access it from the icon on the task bar.

Original GEDCOM, viewed in Java. May view off screen the first time opened.
(Click on the image to enlarge)

Chart errors can be seen using View ⟶ Chart Info (q)
The errors list problems with the structure of the chart.

Chart Errors. The structure of the chart also helps identify errors
(Click on the image to enlarge)
 The chart structure also helps identify errors. The lines on the chart indicate something is wrong.
 Fix errors using the Right Click ⟶ RelationShips menu.