Crystal Reports Error while invoking .RPT with Sub-Reports !

Message

     Hi,

We are using Crystal Reports Java Report Component (JRC SDK) to produce reports in PDF format. We are facing some issues with some .RPT files  that have dynamic parameters in it and are failing with below mentioned error log. It seems to be some installation/JRC issue. But I am just wondering if anyone has insight, if this could be a problem with the .RPT file itself?

Please note that the same .RPT file can be run manually and is generating the output by accepting the parameters.

CB version is 6.01
Java version 1.5.0
Crystal Reports X1 – version 11.5.8.939

Snippet from the attached log file. Task is run with debug option and the errors are shown below… 

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
07:08:53:755 [main] INFO  com.businessobjects.reports.sdk.JRCCommunicationAdapter  - JRCAgent1 received request: compoundRequest
07:08:53:755 [main] INFO  com.businessobjects.reports.sdk.JRCCommunicationAdapter  - JRCAgent1 received request: modifyParameterFieldCurrentValuesRequest
07:08:53:758 [main] ERROR com.businessobjects.reports.sdk.JRCCommunicationAdapter  - JRCAgent1 detected an exception: com.crystaldecisions.proxy.remoteagent.GenericRequest incompatible with com.crystaldecisions.proxy.remoteagent.ModifyObjectRequest
        at com.businessobjects.reports.sdk.JRCCommunicationAdapter.request(Unknown Source)
        at com.businessobjects.reports.sdk.JRCCommunicationAdapter.request(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.y.a(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.r.a(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.r.else(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.r.for(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.cf.a(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
        at com.crystaldecisions.reports.sdk.PrintOutputController.export(Unknown Source)
        at JRC.main(JRC.java:165)

07:08:53:758 [main] ERROR com.businessobjects.reports.sdk.JRCCommunicationAdapter  - JRCAgent1 detected an exception: com.crystaldecisions.proxy.remoteagent.GenericRequest incompatible with com.crystaldecisions.proxy.remoteagent.ModifyObjectRequest
        at com.businessobjects.reports.sdk.JRCCommunicationAdapter.request(Unknown Source)
        at com.businessobjects.reports.sdk.JRCCommunicationAdapter.request(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.y.a(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.r.a(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.r.else(Unknown Source)
        at com.crystaldecisions.proxy.remoteagent.r.for(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.cf.a(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
        at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
        at com.crystaldecisions.reports.sdk.PrintOutputController.export(Unknown Source)
        at JRC.main(JRC.java:165)

07:08:53:771 [main] ERROR JRC  - Crystal Reports exceptoin com.crystaldecisions.sdk.occa.report.lib.ReportSDKException: com.crystaldecisions.proxy.remoteagent.GenericRequest incompatible with com.crystaldecisions.proxy.remoteagent.ModifyObjectRequest----
Error code:-2147467259 Error code name:failed

<S90007> mc_report Completed Wed Jun  3 07:08:54 2009.
[1479070]--> END
<E00423> tlm: Process for task 159628 terminated abnormally.

Thanks,