Full bar rest representation

[Hans de Rijck]

Hi,

Can anyone tell me how to represent a full bar rest when using 'odd' time
signatures?
e.g. in a 4/4 time a full rest is represented by r1 ,
in 2/4 time a full rest is r2 and in 3/4 it is r2.
But, what is a full rest in times like 5/4 7/4 12/4 7/8 etc.

I'm trying some Carmina Burana parts and the 'barcheck fails' warnings are
whizzing around my ears.

Thanks,

Hans de Rijck