Hey Tommy,
This is a great tip! :...) for a next time.
Unfortunately, it can´t be applied to my particular case. The pictures I have can´t be renamed and each of them show several items ( parts of a machine ) which I must indentify individually (this means that most of times, several items of my excel list are are hyperlinked to the same picture)...
But still, thanks for the tip. It will work in future

Robert