The code splits the source/file names using underscore and dot. Therefore, the names of sources and files should use dashes if necessary. Save the underscore for the “sources” or “scans” part of the file name, and save the dot for the extension. i.e.:
scan file name of COSMOS-split_scans.txt is good (tile name recognized as COSMOS-split)
scan file name of COSMOS_split_scans.txt is bad (tile name recognized as COSMOS)