RFC Error While Invoking A Remote Function Module.

I am invoking A remote function module while invoking it get an exception when i see the error logs
com.sap.tc.webdynpro.modelimpl.dynamicrfc.WDDynamicRFCExecuteException: Screen output without connection to user. , error key: RFC_ERROR_SYSTEM_FAILURE at com.sap.tc.webdynpro.modelimpl.dynamicrfc.DynamicRFCModelClassExecutable.execute(DynamicRFCModelClassExecutable.java:101) at... [see details]
can anyone pls tell me what the error is..
regards
Nilesh Taunk.

Hi Nilesh Taunk,
You can go through the following steps
-o JCO Exceptions 1. http://help.sap.com/saphelp_nw04s/helpdata/en/f6/daea401675752ae10000000a155106/frameset.htm
-o JCO Exceptions 2. http://help.sap.com/saphelp_nw04/helpdata/en/f6/e002416225f023e10000000a155106/frameset.htm
-o Restart of the J2EE instance and try re-importing the RFC model. Sometimes it helps.
-o Logon into WebDynpro Content Administrator as a J2EE Admin and check if the JCO Connections and User /pwd of your application is correct. You can ping or test your JCO connections. if something is wrong, enter the values again for JCO n retest them.
-o Try undeploying or removing the complete application and redeploy it.
Tu undeploy please go to
Go to Visual Admin -> Server -> Services -> Deploy ->

Under Runtime Tab
select the server, open the tree , you would find the webdypro list there.
Now select an application, first stop it, remove it and redeploy if necessary.
Let us know if you could solve the problem or not, gud luck!
Rgds,
Sreenivas.

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Runtime Errors CALL_FUNCTION_UC_STRUCT
Except. CX_SY_DYN_CALL_ILLEGAL_TYPE
Short text
 Type conflict during structure parameter transfer at CALL FUNCTION.
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 Error in the ABAP Application Program
 The current ABAP program "ZDLROUTSTANDING_COPY" had to be terminated because it
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 come across a statement that unfortunately cannot be executed.
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 procedure "PDF" "(FORM)", nor was it propagated by a RAISING clause.
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 Program ZDLROUTSTANDING_COPY
 Include ZDLROUTSTANDING_COPY
 Row 876
 Module type (FORM)
 Module Name PDF
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 Program ZDLROUTSTANDING_COPY
 Include ZDLROUTSTANDING_COPY
 Row 894
 Module type (FORM)
 Module Name PDF
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Line SourceCde
864 ** i_logo = 'ENJOYSAP_LOGO'
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866
867 ENDFORM. "alv_top_of_page1
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879
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881 ssfctrlop-preview = 'X'.
882 ssfctrlop-getotf = 'X'.
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886
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HI
GOOD
GO THROUGH THIS LINKS,THEY MIGHT HELP YOU TO GIVE YOU SOME MORE IDEA.
Re: RFC Error While Invoking A Remote Function Module.
RFC Error While Invoking A Remote Function Module.
http://sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/5303c390-0201-0010-e0b2-bfae018377f0
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i am trying to generate purchase order and i create a BAPI also which is active.
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Hi,
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         ls_pohdx TYPE bapimepoheaderx,
         lt_poit TYPE TABLE OF bapimepoitem,
         lt_poitx TYPE TABLE OF bapimepoitemx,
         ls_poit TYPE bapimepoitem,
         ls_poitx TYPE bapimepoitemx.
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