Error(Access via 'NULL' object reference ) in link to action

Hi,
 I have a table-VBAK with "LinkToAction" is one of my column,Once i click that action,i want to call one more table-VBAP in the "TablePopin".
OnAction of "LinkToAction"
I called the another Table(VBAP)-"TablePopin" with the help of following code,
context_element->set_attribute( name = 'SELECTED_POPIN' value = 'TABLEPOPIN' ).
Now i want to fill the VBAP-Table.
So OnAction of "LinkToAction".
i called the
method ONACTIONOPEN_POPIN .
DATA:
 NODE_VBAK1 TYPE REF TO IF_WD_CONTEXT_NODE,
 ELEM_VBAK1 TYPE REF TO IF_WD_CONTEXT_ELEMENT,
 STRU_VBAK1 TYPE WD_THIS->ELEMENT_VBAK1,
 wa_vbap type vbap,
 itab_vbap like table of wa_vbap.
navigate from <CONTEXT> to <VBAK1> via lead selection
NODE_VBAK1 = WD_CONTEXT->GET_CHILD_NODE( NAME = 'VBAK1' ).
@TODO handle not set lead selection
IF ( NODE_VBAK1 IS INITIAL ).
ENDIF.
get element via lead selection
ELEM_VBAK1 = NODE_VBAK1->GET_ELEMENT( ).
@TODO handle not set lead selection
IF ( ELEM_VBAK1 IS INITIAL ).
ENDIF.
ELEM_VBAK1->GET_STATIC_ATTRIBUTES(
 IMPORTING
 STATIC_ATTRIBUTES = STRU_VBAK1 ).
if stru_vbak1 is not initial.
select * from vbap into table itab_vbap where vbeln = STRU_VBAK1-vbeln.
endif.
context_element->set_attribute( name = 'SELECTED_POPIN' value = 'TABLEPOPIN' ).
endmethod.
i set the break point and check it.once it enter into the following area of the above code,i am getting error like Access via 'NULL' object reference
ELEM_VBAK1->GET_STATIC_ATTRIBUTES(
 IMPORTING
 STATIC_ATTRIBUTES = STRU_VBAK1 ).
Now my problem is,i want to fill the VBAP-Table in my "TablePopin".Once i click the "LinktoAction" in my Main Table.
can any body share your ideas.
Thanks in Advance,
Regards,
Ravi.

Hi Ravi,
Have you filled in the node_vbak1 with some elements? Lets say in a supply function or wddoinit etc.?
Just check that. After that, make sure you have IntializeLeadSelection property set to true for the node_vbak1.
Hope this helps.
Regards,
Neha

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>
tomcat123 wrote:
> Hi All!
> I'm a beginner of Adobe form.
> problem 1:
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> I checked every step, but unfortunately it reported an error: Access via 'NULL' object reference not possible. I found that the error happens when trying to get element of the context node.
> I also have such problem when I was studying the tutorial https://wiki.sdn.sap.com/wiki/display/WDABAP/CallAdobeFormthroughABAPWebDynpro.
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>
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2613 data: l_parameters         type ref to
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2624                                      i_mode =
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2630             CATCH cx_fp_api_repository into l_exceptions.
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2635
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IC WEBCLIENT: Access via 'NULL' object reference not possible

Hi,
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Above error is occuring even If i run the standard CRM_IC BSP application and select one simple view.
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WebDynpro Abap MSS: Access via "NULL" object reference not possible

hi,
My customer send me the following link to Appraisal Documents (Manager) MSS
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http://a.imageshack.us/img685/5959/mss3.jpg (logon in Costumer SAP System)
http://a.imageshack.us/img225/4008/mss4.jpg (Appraisal Documents (Manager) MSS run succesful)
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http://a.imageshack.us/img715/5355/mss1j.jpg (SCIF in my SAP System)
http://a.imageshack.us/img44/5346/mss2.jpg (SCIF - test service)
http://a.imageshack.us/img840/1677/mss2b.jpg (Error, without window logon)
 Access via "NULL" object reference not possible
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Ivan

Hello
The most important information is (again) missing: which object reference is initial ("NULL")?
The ABAP dump will tell you.
Below I show an example how this can happen (and be avoided):
LOOP AT lt_accountings INTO ls_accounting.
lo_po_account ?= ls_accounting-accounting.
ENDLOOP.
" QUESTION: Are you sure that lo_po_account hold an instance ???
" If LO_PO_ACCOUNT is empty the following statement will give you the dump.
ls_mepoaccounting = lo_po_account->get_data( ).
" And that is how to avoid this (at least the dump. Whether your logic is still ok is another matter...)
CHECK ( lo_po_account IS BOUND ).
ls_mepoaccounting = lo_po_account->get_data( ).
Regards
Uwe

Access via 'NULL' object reference not possible - GET_RANGE_TABLE_OF_SEL_

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if l_ref_cmp_usage->has_active_component( ) is initial.
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call method wd_this->m_handler->add_horizontal_divider
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DATA: NODE_FLIGHTS TYPE REF TO IF_WD_CONTEXT_NODE.
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DATA: WSFLIGHT TYPE SFLIGHT.
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Err: The following error text was processed in the system BCD : Access via 'NULL' object reference not possible.
please help me out on this issue.
Thanks and Regards
Vinayak Sapkal

hi ,
The attribute M_HANDLER is an attirbute of component controller (as told by your post) and so you cannot access it as you have done it.
You will have to access it as .
WD_COMP_CONTROLLER->M_HANDLER->GET_RANGE_TABLE_OF_SEL_FIELD(I_ID = 'S_CARR_ID' ).
Try doing it.
Or else , if you have created a similar attribute in your view itself , then it is "INITIAL" and hence you are getting the dump.
You will have to assign the view attribute "M_HANDLER" with the value of your component controller attribute "M_HANDLER" ,because all the initializations are done in WDDOINIT of comp controller and on component controller atribute "M_HANDLER".
Thanks,
aditya.

(104) RFC_ERROR_SYSTEM_FAILURE: Access via 'NULL' object reference not poss

Hi ,
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Hi Anil,
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The specified item was not found.
go through the help..
http://help.sap.com/saphelp_nw04s/helpdata/en/c8/e80440a832e369e10000000a155106/content.htm
Hope it helps...
Thanks,
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RFC was working fine , suddenly starting showing error below ( not sure if i changed anything ) -
Rest of the RFC's in the same app are working fine.
The error throwed is -
com.sap.tc.webdynpro.modelimpl.dynamicrfc.WDDynamicRFCExecuteException: Access via NULL object reference not possible., error key: RFC_ERROR_SYSTEM_FAILURE
Full error details -
com.sap.tc.webdynpro.modelimpl.dynamicrfc.WDDynamicRFCExecuteException: Access via NULL object reference not possible., error key: RFC_ERROR_SYSTEM_FAILURE
     at com.sap.tc.webdynpro.modelimpl.dynamicrfc.DynamicRFCModelClassExecutable.execute(DynamicRFCModelClassExecutable.java:101)
     at com.sap.xss.per.fc.persinfo.FcPersInfo.onCleanup(FcPersInfo.java:561)
     at com.sap.xss.per.fc.persinfo.wdp.InternalFcPersInfo.onCleanup(InternalFcPersInfo.java:798)
     at com.sap.xss.per.fc.persinfo.FcPersInfoInterface.onCleanup(FcPersInfoInterface.java:246)
     at com.sap.xss.per.fc.persinfo.wdp.InternalFcPersInfoInterface.onCleanup(InternalFcPersInfoInterface.java:299)
     at com.sap.xss.per.fc.persinfo.wdp.InternalFcPersInfoInterface$External.onCleanup(InternalFcPersInfoInterface.java:459)
     at com.sap.pcuigp.xssfpm.wd.FPMComponent.cleanUp(FPMComponent.java:644)
     at com.sap.pcuigp.xssfpm.wd.FPMComponent.access$1000(FPMComponent.java:78)
     at com.sap.pcuigp.xssfpm.wd.FPMComponent$FPM.exitCalled(FPMComponent.java:963)
     at com.sap.pcuigp.xssfpm.wd.FPMComponent$FPMProxy.exitCalled(FPMComponent.java:1134)
     at com.sap.pcuigp.xssfpm.wd.BackendConnections.wdDoExit(BackendConnections.java:124)
     at com.sap.pcuigp.xssfpm.wd.wdp.InternalBackendConnections.wdDoExit(InternalBackendConnections.java:228)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingCustomController.doExit(DelegatingCustomController.java:77)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.exitController(Controller.java:180)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.exit(Controller.java:154)
     at com.sap.tc.webdynpro.progmodel.controller.Component.exitController(Component.java:251)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.exit(Controller.java:154)
     at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.exit(ClientComponent.java:219)
     at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.exit(ClientApplication.java:474)
     at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.destroy(ClientApplication.java:527)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.destroy(ApplicationSession.java:398)
     at com.sap.tc.webdynpro.clientserver.session.ClientWindow.destroyApplicationSession(ClientWindow.java:235)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doDestroyApplication(ClientSession.java:1003)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doSessionManagementPostProcessing(ClientSession.java:789)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:264)
     at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet(DispatcherServlet.java:46)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(AccessController.java:219)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:102)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:172)
Caused by: com.sap.aii.proxy.framework.core.BaseProxyException: Access via 'NULL' object reference not possible., error key: RFC_ERROR_SYSTEM_FAILURE
     at com.sap.aii.proxy.framework.core.AbstractProxy.send$(AbstractProxy.java:150)
     at com.sap.xss.per.model.mac.HRXSS_PER_MAC.hrxss_Per_Cleanup(HRXSS_PER_MAC.java:331)
     at com.sap.xss.per.model.mac.Hrxss_Per_Cleanup_Input.doExecute(Hrxss_Per_Cleanup_Input.java:137)
     at com.sap.tc.webdynpro.modelimpl.dynamicrfc.DynamicRFCModelClassExecutable.execute(DynamicRFCModelClassExecutable.java:92)
     ... 43 more
Thanks,
Regards,
Ankit

Hello Vaish & Ankit,
Can you check what is the dump occurred in transaction ST22?
I hope you guys are working with HR data. So, i think some object is not passed(internally) correctly in RFC.
Please debug the RFC by keeping the breakpoint from webdynpro application, then you will come to know what is not passed when we execute the RFC from R/3.
Regards
Nizamudeen SM

Acessing a webtemplate 3.x in the portal, error Access via 'NULL' object

Hi
I'm having problems with my webtemplates developed in 3.x that run in the portal I get this error message:
I look in st22 but didn't see anything that could help. I have webtemplates developed in 7.0 and they are working fine in my portal. The problems is happening to the 3.x webtemplates only.
Any suggestions?
Thanks
Error when processing your request
What has happened?
The URL http://cads301cnsa.corp.csa-group.org:8015/zwebrep was not called due to an error.
Note
The following error text was processed in the system BIP : Access via 'NULL' object reference not possible.
The error occurred on the application server cads301cnsa_BIP_15 and in the work process 0 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: PAGE_REDIRECT of program CL_RSR_WWW_HTTP===============CP
Method: IF_HTTP_EXTENSION~HANDLE_REQUEST of program CL_RSR_WWW_HTTP===============CP
Method: EXECUTE_REQUEST_FROM_MEMORY of program CL_HTTP_SERVER================CP
Function: HTTP_DISPATCH_REQUEST of program SAPLHTTP_RUNTIME
Module: %_HTTP_START of program SAPMHTTP
Edited by: Michelle Machado on Jan 14, 2009 5:21 PM

Hi Ravi,
Have you filled in the node_vbak1 with some elements? Lets say in a supply function or wddoinit etc.?
Just check that. After that, make sure you have IntializeLeadSelection property set to true for the node_vbak1.
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Regards,
Neha

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