When you import a CSV with the Alamy-Lightroom Bridge, it needs some key information to allow it to understand what changes to make to which photos. The CSV should have a header row with at least one of these columns:

• Filename
• Path
• ImageRef

In addition, any other columns that are recognised will be used to actually set the data. The easiest way to find out what columns are used is to export a CSV and use that as a template.

It is also possible that the CSV file is incorrect in some way. If this is the case then the plugin should give you a clear error message saying what the problem is, and on what line of the CSV file, to allow you to manually correct the file.