Database::Conn seems to be some module of yours. And your bug may be in your data or in Database::Conn, judging from your very meager description. Is it possible that executeHashRef deletes or changes values in the hashes %$ind_list or %$snp_list?

In reply to Re: reason for not getting the data when passed to a query by jethro
in thread reason for not getting the data when passed to a query by Anonymous Monk

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