The errno code for the error which triggered the event.
This property function may only be called if Event.type is either bindFailed, acceptFailed or closeFailed.
Error if the property is called for a wrong event type.
zmq_event_t.data.xyz.addr, where xyz is the event-specific union.
See Implementation
The errno code for the error which triggered the event.
This property function may only be called if Event.type is either bindFailed, acceptFailed or closeFailed.