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Messaging and ESB
Implementing Messaging : Managing connections and sessions : Accessing message delivery parameters : Setting the maximum number of messages
 
Setting the maximum number of messages
The default maximum number of active JMS messages in an OpenEdge session is 50. This is the maximum number of messages that have been created, but not deleted by the application. To change the default, the main procedure of the OpenEdge application must include the definition of JMS-MAXIMUM-MESSAGES global variable.
Note: If you exceed the limit on the JMS-MAXIMUM-MESSAGES global variable, an error is returned.