I was getting the error "[C++ Error] oledb.h(2920): E2015 Ambiguity between 'DBROWCOUNT' and 'Zplaindblibdriver::DBROWCOUNT'". The only solution that worked was to remove the unit which has CBuilder ADO components.
I think Zeos do not get along with Borland's ADO components.
Best regards.
DBROWCOUNT Ambiguity
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