Then, let the OP clear it up: Does he want a watermark with the file name and sequence number of it, or a filename that includes a sequence number.
Frankly, creating a filename with a sequence number for each image would be alot easier; you can do it in the print module, and you still have to create a name plus sequence, and it should print a 1/XX, 2/XX, etc. on the images (make sure Photo Info is checked and you choose "Sequence" as an option). If you choose this option, be sure and select where you want the images (I would suggest Desktop) and once you click Print/Print LR will create a folder with the images all named and in sequence (in the file names) and also have the 1/xx, 2/xx, on the image file. You may have to play with the font color for the name printed on the image file, since it defaults to black. Just not sure if that is what you want vs. a unique filename for each photo.
So exactly what, Mr. OP, are you looking for?
