- memcached_return_t memcached_set_error(memcached_server_st&, memcached_return_t rc, const char *at, const char *str, size_t length);
+ memcached_return_t memcached_set_error(memcached_instance_st&, memcached_return_t rc, const char *at, const char *str, size_t length);