It is not uncommon for the exact placement of the outline (the physical boundary of the PCB) to be ambiguous to the PCB manufacturer or for the outline not to be closed, as the example image shows. This error can confuse and delay PCB manufacturing.
Our freely available PCB Visualizer basically checks the outline in the delivered PCB data and points out misaligned or incomplete outlines. And now comes the best part: with the Outline Editor from the Visualizer Toolbox, you can correct the outline directly at the respective point. It's very easy and intuitive. How ingenious is that?
Find out how to use the freely accessible outline editor here