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java.lang.NullPointerException at java.lang.String.concat(String.java:1827) at com.sun.activation.registries.MailcapFile.parseLine(MailcapFile.java:235) at com.sun.activation.registries.MailcapFile.parse(MailcapFile.java:197) at com.sun.activation.registries.MailcapFile.createMailcapHash(MailcapFile.java:157) at com.sun.activation.registries.MailcapFile.<init>(MailcapFile.java:40) at javax.activation.MailcapCommandMap.loadFile(MailcapCommandMap.java:276) at javax.activation.MailcapCommandMap.<init>(MailcapCommandMap.java:128) at javax.activation.CommandMap.getDefaultCommandMap(CommandMap.java:44) at javax.activation.DataHandler.getCommandMap(DataHandler.java:136) at javax.activation.DataHandler.getDataContentHandler(DataHandler.java:568) at javax.activation.DataHandler.getInputStream(DataHandler.java:222) at javax.activation.DataHandlerDataSource.getInputStream(DataHandler.java:658) at org.apache.axis.attachments.MimeUtils.getContentLength(MimeUtils.java:115) at org.apache.axis.attachments.MimeUtils.getContentLength(MimeUtils.java:60) at org.apache.axis.attachments.AttachmentsImpl.getContentLength(AttachmentsImpl.java:438) at org.apache.axis.Message.getContentLength(Message.java:512) at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:373) at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138) at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32) at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118) at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83) at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165) at org.apache.axis.client.Call.invokeEngine(Call.java:2784) at org.apache.axis.client.Call.invoke(Call.java:2767) at org.apache.axis.client.Call.invoke(Call.java:1870) at org.apache.axis.soap.SOAPConnectionImpl.call(SOAPConnectionImpl.java:90) at example.attachments.EchoAttachment.echoUsingSAAJ(EchoAttachment.java:492) at example.attachments.EchoAttachment.main(EchoAttachment.java:323)