Windows has a command line length limit.
Dropping too many files on it at once can exceed that limit.
But seems weird that it disallows then allows the same number.
Not sure whether Windows will break it into multiple commands.
This is what I was finding weird. I had expected I could drop the number to a point which would give me a clue. But to then accept greater numbers made little sense. The only thing I could think of was something interrupted the process. I will just have to make sure I don't try and rename too big a group
Accepted, it's not a perfect solution, but it has proven the concept works, and although it can be quite slow on larger batches. I would say having all the species in one screen does allow for a general increase in speed and easier processing.
The biggest time consumer is creating the shortcuts and setting icons.
I got the shortcut creation time down creating a text list of all the species, prefixing with underscore and replacing spaces with underscore. Then prefixing the whole lot with the command. I then duplicated the shortcut 150 times renamed to species and finally properties to change the command inside.
I still have to finish the icon side
The concept will work for just about anything I want to add.
I also suffix with location, so have used the same technique for that too. Saves having to open a renaming program and select to create a rule for the change.
I can see a full fledged drag drop with creation from a data list would benefit those who predominantly use a mouse.
All i need to do now is figure the best way of handling which camera in the filename.