It looks like changing the elements[0] = CStringGetDatum(localT1.c_str()); elements[1] = CStringGetDatum(localT2.c_str()); to: elements[0] = PointerGetDatum(cstring_to_text(localT1.c_str())); elements[1] = PointerGetDatum(cstring_to_text(localT2.c_str())); Solved the problem. If anyone thinks that there is a better way please tell me. Best regards, Tal -- Sent from: http://www.postgresql-archive.org/PostgreSQL-general-f1843780.html