The most likely cause of this error is a non-BEA TUXEDO system process sending messages via UNIX; queues and mistakenly putting one such message on mio's queue. Examine other operations on your system to ensure that this is not occurring. Additionally, check permissions specified in your UBBCONFIG file to allow write access only as necessary. If the problem cannot be resolved, then please contact your BEA TUXEDO system Technical Support.