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JNLP Script issue

We are  testing a JNLP application using loadrunner 12.02 version

The issue is that the request body is in form binary("EncType=application/x-java-serialized-object",) and it is difficult to debug for correlation and parameterization. A sample request is mentioned below.

Also the response for the requests appears in encrypted format. Same thing is happening for all the requests appearing in the script.

Can you please provide solution/alternative for same in order to test the application.
==============================

"EncType=application/x-java-serialized-object",
"BodyBinary=\\xAC\\xED\\x00\\x05ur\\x00\\x13[Ljava.lang.Object;\\x90\\xCEX\\x9F\\x10s)l\\x02\\x00\\x00xp\

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We have tried below things

Protocols used for recording :- Web (HTTP/HTML) and Java over HTTP both with “Remote Application via Loadrunner Proxy” in recording option.

Steps mentioned in below links :-

1) “Does LoadRunner_PerformanceCenter support...nical_documents - HPE Software Support.pdf” mentioned on HP Website http://support.openview.hp.com/selfsolve/document/KM169714 ;

2) Steps mentioned in the link for recording Java over HTTP protocol http://lrhelp.saas.hpe.com/en/12.53/help/WebHelp/Content/VuGen/Protocols/Java/138700_t_how_to_record_with_java_http.htm

3) In web protocol tried DFE settings with

i) Binary to XML

ii) GWT Extension  with inclussion of all application jar files and all java jar files present in lib folder for GWT extention.
..\Java\jdk1.6.0_38\jre\lib;

The latest version of Loadrunner 12.53 shows "Java to XML extension" in DFE settings which transforms Java serialized objects to XML format.  

Please advice if this can work as we don't have the latest version of Loarunner installed on Client Machine to verify.

Thanks in advance for help.

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