I have a same question. I am using solace standard version in docker on my laptop. I am creating queues dynamically using SEMP APIs on runtime. But the APIs start throwing error after the queue limit reaches 99. If I delete a few and retry, it keeps creating till it reaches 99 again, then the same error. The Error is 400 bad request. In msgVpn settings, the msg max spool usage is 150000, and the maximum number of queues/endpoints is: 10000