I have a map that I am having to make changes to due to a system update. We have a Mercator map that uses the file name to pull a piece of information. The information is a document number for each file. Our current system will pass the file name to Mercator which is where the map is getting the number from. The new system pass an internal file path and name to the map. I do have a series of environment variable from out back to use and one of them is the original file name. What I need to know is how to pass this one small blob of text to the input card. It is not passing the file just a small bit of text.