unpredictable combobox behavior
 

I have a few comboboxes in userforms that are populated via the
rowsource property. the rowsource is assigned a named range which is
dependent upon the results of the program. occasionally, the combobox
will not contain all of the contents of the named range which it is
assigned. I have double checked to see if the named range is correct,
and it always is. usually if i rerun it, it will be fine. there is no
pattern to this. it is completely random and very frustrating. does
anyone have any ideas? thanks.