Hello, I had trouble of registering an VIR_DOMAIN_EVENT_ID_LIFECYLCE event for different domains separately. First I invoke [0] with one domain, and later with another one. For the second call the operation will be denied by "libvir: error : internal error event callback already tracked". I assume this should be possible for different domains to register LIFECYLCE handler separately. In that case please consider the attached patch. Thanks, Alex B. [0] virConnectDomainEventRegisterAny( conn, domX, VIR_DOM_EVENT_ID_LIFECYLCE, VIR_DOMAIN_EVENT_CALLBACK(myDomainEventCallback2), strdup("callback 2"), myFreeFunc);