On BSM 9.26 you could eventually find errors on the logs regarding HornetQ such:
Caused by: javax.jms.JMSRuntimeException: Invalid message queue name: jms.topic.dc.*.Default Client.*
This is a known issue on BSM 9.26, it is a defect on System Health application which create the error message on HQ log file.
The defect can be tracked here: