> I think I understand what you are saying - but what's confusing me is that what you are telling me won't work is exactly what I have. Meaning that two such relationships already exist - I'm just having trouble with the third.
>
> I have two other relationships set where Table A is linked to Table B (Field to index), and Table C is linked to Table B (field to index). If that's an invalid relationship, why did VFP allow it in the first place?

Daniel,

I ahve no idea why FoxPro allowed it. But thnk about it, at any one point in time what record is Table B supposed to point to. Is it the record related to Table A or the record related to Table C? With this type of relation what is usually needed is reverse relationships, that is Table B related to A and table B related to C so that moving in B moves in both A and C.