request processing error: it.senato.doclocator.server.core.MissingParameterValue: ID

 	at it.senato.doclocator.server.core.Variable$ParameterOrVariableExpansion.expand(Variable.java:115)
 	at it.senato.doclocator.server.core.Variable.expandSequence(Variable.java:184)
 	at it.senato.doclocator.server.core.Variable.expandInternal(Variable.java:199)
 	at it.senato.doclocator.server.core.Variable.expandValue(Variable.java:221)
 	at it.senato.doclocator.server.core.Variable$ParameterOrVariableExpansion.expand(Variable.java:105)
 	at it.senato.doclocator.server.core.Variable.expandSequence(Variable.java:184)
 	at it.senato.doclocator.server.core.Variable.expandInternal(Variable.java:199)
 	at it.senato.doclocator.server.core.Variable.expandValue(Variable.java:223)
 	at it.senato.doclocator.server.core.Request$GetRequest.execute(Request.java:76)
 	at it.senato.doclocator.server.core.ConfigurationSet.handleGetRequest(ConfigurationSet.java:108)
 	at it.senato.doclocator.server.tcp.TcpServer.handleGetRequest(TcpServer.java:116)
 	at it.senato.doclocator.server.tcp.RequestServer.handleV1Request(RequestServer.java:220)
 	at it.senato.doclocator.server.tcp.RequestServer.handleRequest(RequestServer.java:315)
 	at it.senato.doclocator.server.tcp.RequestServer.run(RequestServer.java:180)