observed a syntax error: from: zframe_send (&frame, sock, ZMQ_SNDMORE); to: zframe_send (&frame, sock, ZFRAME_MORE); original question still stands... -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.zeromq.org/pipermail/zeromq-dev/attachments/20131030/143c7acb/attachment.htm>