Volker, > Is that fixable? Or should I rather send the reply in another irpc message > (which feels wrong to me)? I've added a defer_reply field in the irpc_message structure. You should be able to do deferred replies now like this: irpc->defer_reply = True; then when you are ready to send the reply do: irpc_send_reply(irpc, status); Cheers, Tridge