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Hello! I'm doing some web services that use an embedded form of BD in db4o. When I make the request to a service any of the place, I create a static object ObjectServer for all services can use to access it, that is, the object instance in the form of BD Singleton. All services are functioning correctly if I go either locally or ...

Edwin, Thanks for your reply and suggestions. I will look more closely in the reference documents... I also tried to incorporate your Configuration suggestions. My server code now reads:             Configuration config = Db4o.newConfiguration();           ...

Okay, I finally figured out what the problem was with my NQ in Client/Server.  It basically came down to the anonymous inner class and how DB4O sends the query over the network to the server.  It wasn't able to serialize it correctly, so the query didn't work.  I moved my Predicates out of the dao class and into their own.  ...