CWSXA2007E No messaging engine names are available for the cluster.

Explanation
A valid messaging engine name cannot be created because the maximum number of messaging engines has been reached for this cluster.
User response
Specify different configuration data when creating the messaging engine.For details of how to do this you can refer to the information Centre at http://publib.boulder.ibm.com/infocenter/dmndhelp/v6r1mx/index.jsp.