Crystal report problem when combining SuppressIf Zero and SuppressIf Duplicated

Question

Hi ! I use SuppressIfZero on a conditional formula, that works fine to filter results from my database where the result is actually 0. However, I group these results by other fields and want to suppress duplicated grouping entries. That does not work if 0 and non-zero values are in alternating order. I think that the suppressIfDuplicated does not work on entries that are SuppressedIfZero by a formula result. Is this a common problem with a workaround ? Thanks CH