-150 ERR CNCT REFUSED MRB (Magic xpa 4.x)
An enterprise server could not connect to the broker.
Check if the broker has started and that the host name of the broker's MessagingServer keyword in the Magic.ini file, belongs to the correct IP address (ping <mrbhost>).
You can trace the problem by setting the Log parameter to Enabled in the Mgreq.ini file in the enterprise server directory.