I don't think Crystal has any mechanism for telling you which fields are suppressed, short of looking at the suppression section. Moreover, tests that occur at the same stage in the logic cycle cannot refer to each other--that's why you can't sum sums or suppress blank subreports, at least not directly.
You need to follow lbass's advice, repeat the same test that does the suppression. Or else turn the test into a formula field and test it both places.
Madawc Williams
East Anglia, Great Britain