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java.lang.NullPointerException: 	at weblogic.net.http.HttpURLConnection.getInputStream(HttpURLConnection.java:456)	at weblogic.net.http.SOAPHttpsURLConnection.getInputStream(SOAPHttpsURLConnection.java:37)	at weblogic.net.http.HttpURLConnection.getResponseCode(HttpURLConnection.java:1035)	at com.paypal.core.HttpConnection.execute(HttpConnection.java:109)	at com.paypal.core.APIService.makeRequestUsing(APIService.java:177)	at com.paypal.core.BaseService.call(BaseService.java:265)	at urn.ebay.api.PayPalAPI.PayPalAPIInterfaceServiceService.setExpressCheckout(PayPalAPIInterfaceServiceService.java:2196)	at urn.ebay.api.PayPalAPI.PayPalAPIInterfaceServiceService.setExpressCheckout(PayPalAPIInterfaceServiceService.java:2148)	at com.guidedchoice.struts.actions.PayPalProcessingAction.execute(PayPalProcessingAction.java:208)	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:184)	at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:529)	at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:253)	at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:274)	at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:320)	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:184)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3750)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3714)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)	at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2182)	at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1491)	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)	at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)