Return code value -8174 on ldapssl_client_init?

[Geoffrey Kidd <sehlat@uclink4.berkeley.edu>]

Where is there a list of return codes and their meaning(s)?

I'm executing:

> ldapssl_client_init("slapd-manzanita-cert7.db",NULL);

and getting a -8174 as the numerical value of the return code.

Thanks.