code: def buildASNList(rootnames, asnname, check_for_duplicates=True):
      
  
      # Recognize when multiple valid inputs with the same rootname are present
      # this would happen when both CTE-corrected (_flc) and non-CTE-corrected (_flt)
      # products are in the same directory as an ASN table
      filelist, duplicates = checkForDuplicateInputs(rootnames)
  
      if check_for_duplicates and duplicates:
          # Build new ASN tables for each set of input files
          origasn = changeSuffixinASN(asnname, 'flt')
          dupasn = changeSuffixinASN(asnname, 'flc')
  
          errstr = 'ERROR:\nMultiple valid input files found:\n'
          for fname, dname in zip(filelist, duplicates):
              errstr += '    %s    %s\n' % (fname, dname)
          errstr += ('\nNew association files have been generated for each '
                     'version of these files.\n    %s\n    %s\n\nPlease '
                     're-start astrodrizzle using of these new ASN files or '
                     'use widlcards for the input to only select one type of '
                     'input file.' % (dupasn, origasn))
  
          print(textutil.textbox(errstr), file=sys.stderr)
  
          # generate new ASN files for each case,
          # report this case of duplicate inputs to the user then quit
          raise ValueError
  
      return filelist
docs: Return the list of filenames for a given set of rootnames