10
The configured maximum number of message queues have already been created.
srv_createmsgq() has been called, but the maximum number of configured message queues are already in use.
Free message queues using srv_deletemsgq() or configure SRV_S_NUMMSGQUEUES to increase the number of message queues.
Symbolic constant: SRV_EMAXMQUEUES
15.0 and later.