how do I use the -5 option of gendaymtx?

edit

when I enter:

gendaymtx -5 -m 6 -d -of my.wea > my.smx

program aborts and the standard usage message prints to stderr

when I instead try:

gendaymtx -5 -d -of my.wea > my.smx

or:

gendaymtx -m 6 -5 -d -of my.wea > my.smx

the program seems to run fine, however examining the output shows non zero values for every bin that match the output of:

gendaymtx -m 6 -of my.wea > my.smx

if I run gendaymtx without the -5 option:

gendaymtx -m 6 -d -of my.wea > my.smx

I get the expected 0's in all but the 3 bins closest to the sun.

I'm running Mac OS Mavericks and I tried this with a gendaymtx compiled from HEAD in May as well as with the precompiled installer 5.0.a.4.

Thanks