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Attempt to change ContentType after calling getWriter() (cannot change charset from 'ISO-8859-1' to 'UTF-8')
java.lang.IllegalStateException: Attempt to change ContentType after calling get
Writer() (cannot change charset from 'ISO-8859-1' to 'null')	at weblogic.servlet.internal.ServletResponseImpl.setEncoding(ServletResponseImpl.java:607)	at weblogic.servlet.internal.ServletResponseImpl.setContentType(ServletResponseImpl.java:237)	at oracle.reports.rwclient.RWClient.handleException(RWClient.java:867)	at oracle.reports.rwclient.RWClient.processRequest(RWClient.java:1238)	at oracle.reports.rwclient.RWClient.doGet(RWClient.java:300)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:213)	at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:1265)	at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:1622)	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)