In the following example I am trying to unload all the mcs in
a series from within a nested loop. The series starts at
"col1_mc.mc1" and goes through "col5_mc.mc20". So there are
20 clips in all to unload with 4 clips per "col" or column clip.
To be clear, "col1_mc" contains mc1 through mc4 as children
and so on to "col5_mc" which contains mc17 through mc20 as