The webMethods Broker library keeps a copy of each event type definition used by your application in an event type cache. The cache improves the performance of the event field type checking process because the Broker managing the event type does not have to be contacted each time the event type definition is accessed.

The operation of the event type definition cache is usually transparent to your application. Problems may arise if Software AG Designer is used to alter a Broker's event definitions while your application is executing. In these cases, the locally cached event type definitions will no longer be synchronized with the Broker's type definitions.