I have an artifact database with a bit over 4000 entries, and I'm using the hyperlink function to 'attach' a jpg photo to each artifact. The problem is that not all artifacts have a photo, and I wish to be able to use a column to indicate which links are valid, and which yet need a photo.
How do I test for a lack of photo, using hyperlink? I do get a message informing me of the missing photo, but I hope not to have to go through the database one artifact at a time...