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The response could not be deserialized

 
Greenhorn
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hie guys
my earlier gwt version was 2.2.0 and gxt was 2.2.3 and now i want to upgrade it to gwt version 2.5.1 and gxt as 2.2.5

In dev mode the application works fyn but when i deploy the application and run it it shows me the following service failure error

"The response could not be deserialized "
 
Bartender
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Please post the full stack trace for us to help you figure out whats going wrong.
Taking a wild guess, this could be because your response POJO does not implement Serializable and/or have the default constructor
 
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