Thanks for the suggestion. I take your point and I will have a think about how we can make this more clear.
In the meantime, if you double click the icon to the to the far left of the log configuration (or hover over it) it will give you the file name. You can also double-click the log configuration to open the Parser Wizard which will show the name of the file in the "Test File Name".
The issue here is that users are often opening one file at a time, so the 'failure' file will be pretty obvious. Maybe a better solution would be to add an additional 'file' column if multiple configurations are shown. ...of course, this wouldn't help very much if only one out of 10 files failed to open.
Something to think about. Thanks again for the suggestion.