Maximum Connections per client


We are trying to replace existing activeMq with solace broker. We are trying some POC on this.
Problem: We are getting error message 503: Max Client Queue and Topic Endpoint Flow Exceeded when number consumers on the client exceeds more than 100. We also tried increasing the max connection to 500 through solace yaml file but broker does not starts and complains about this is not accepted value as shown in attatched file . Appreciate any explanation on this. Thanks