in_fil1,s,a," ",,,"Input first file name, or @file_w_both_input_files:"
in_fil2,s,a," ",,,"Input second file name, if infil1 not @nnnn:"
out_file,s,a," ",,,"Output file name to be created:"
slop,r,h,INDEF,,,"Acceptable fractional variance for files (INDEF):"
timeint_fil,s,h,"timeint.fil",,,"Name of the file to contain time intervals (timeint.fil)"
clobber,b,h,yes,,,"Do you want to delete any existing output files? (Yes):"
mode,s,h,"ql",,,"Mode:"