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java.lang.NullPointerException: 	at water.api.RF$RFColumnSelect.queryComment(	at water.api.RequestArguments$Argument.query(	at water.api.RequestQueries.buildQuery(	at water.api.RequestQueries.checkArguments(	at water.api.Request.serve(	at water.api.RequestServer.serve(	at water.NanoHTTPD$	at