Nullpointer exception in SAP code (RFC model related)

Hi,
Some threads have already been opened on this issue, but none of them give me a solution.
The problem is that a Nullpointerexception is thrown when I create a new Input element (to bind it to the input node of my rfc model).
As you can see in the stack trace, the nullpointerexception is thrown in SAP code.
This happens for all function modules I've created myself (even the simplest ones with no parameters/no code), but for the SAP BAPIs it works???
So this is not an issue related to Javaconnectors/my java code because it works for BAPIs (I'm doing exactly the same).
I've already restarted the J2EE server, recreated the whole application, tested with new applications (to avoid any caching problems) but nothing works.
I've been trying to resolve this issue for several hours without success. It's really frustrating.
Any help appreciated!
Jeroen
java.lang.NullPointerException
 at com.sap.tc.webdynpro.modelimpl.dynamicrfc.AiiModelClass.createNewBaseTypeDescriptor(AiiModelClass.java:220)
 at com.sap.tc.webdynpro.modelimpl.dynamicrfc.AiiModelClass.descriptor(AiiModelClass.java:186)
 at com.eozen.aif.ce5solman.Z_Jver_Create_Infosheet_Input.<init>(Z_Jver_Create_Infosheet_Input.java:51)
 at com.eozen.jver.aif.Infosheets.wdDoInit(Infosheets.java:98)
 at com.eozen.jver.aif.wdp.InternalInfosheets.wdDoInit(InternalInfosheets.java:181)
 at com.sap.tc.webdynpro.progmodel.generation.DelegatingComponent.doInit(DelegatingComponent.java:95)

I suddenly realized there is one last option and it works: I managed to sidestep the problem by doing the rfc via an R/3 SAP system that forwards the call to the CRM system. (The CRM 5.0 system is the one causing the nullpointerexception).
Maybe some incompatibilities between J2EE/WDP SP14 & CRM 5.0?

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Hello Team,
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1 View linked to 2 CompCont: NullPointer Exception

Hi,
Here is the architecture of my app :
MainView --> CompContA --> ModelA (RFC function A)
........|
........|---> IntCompB --> CompContB --> Model B (RFC function B)
And here is the content of the MainView :
AdviceNumber : [
Z2_I_Rechercher_Avis_Input.AdviceNumber) | RefreshButton1
UserId : [Z2_I_Rechercher_Bottin_Input.UserId) | RefreshButton2
Name : [Z2_I_Rechercher_Avis_Input.Output.It_Infos_Bottin.Name)
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Then if I change the value of the UserId in the screen and press the RefreshButton2, the second function returns me another name, and I use some Java code to move this name into the Name field of the screen. This works well too.
The problem is that I can't use the refreshButton2 first! I get a NullPointer exception.
And I know why, it's because the « Output » structure of my Z2_I_Rechercher_Avis_Input is not initialized (since the refreshButton1 has not been used yet).
But I can't find the right way to code it.
Can you help me, thanks!
Message was edited by:
 Emanuel Champagne

I want the user to click on the button he wants.
I just need to know how to initialize the Output.Struc1 when the user decides to click on the RefreshButton2 First.
It's the line in bold that give me the error (but that line works well when the RefreshButton1 is used first!)
public void onActionRafraichirAvis(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
 //@@begin onActionRafraichirAvis(ServerEvent)
 //$$begin ActionButton(-775562010)
 wdThis.wdGetAvisCompController().executeZ2_I_Rechercher_Avis_Input();
 //$$end
 // At the return, we need to refresh the values of the screen with the ones returned by the function.
 // Access to the structure showed on the screen
IIt_Infos_BottinElement AvisInfosBottinEl = wdContext
 .nodeIt_Infos_Bottin()
 .currentIt_Infos_BottinElement();
 // Access to the structure received by the RFC function
 IIt_Z2I053TElement BottinEl = wdContext
 .nodeIt_Z2I053T()
 .currentIt_Z2I053TElement();
 AvisInfosBottinEl.setName(BottinEl.getName());
Message was edited by:
 Emanuel Champagne

Error while importing a Adaptive RFC Model

Experts,
I am trying to import an Adaptive RFC Model. Before importing I need to speciy the connection parameters in the import wizard. I am using the single server method to connect and have specified all the parameters correctly. I have not specified a SAP router as I am using a test system. when I click next on the Model import wizard I get an error.
The trace shows-
[code]ConnectionFailed Exception : com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: SAP_CMINIT3 : rc=20 > Connect to SAP gateway failed
Connect_PM GWHOST=test833, GWSERV=sapgw00, ASHOST=test833, SYSNR=00
LOCATION CPIC (TCP/IP) on local host
ERROR partner not reached (host 10.3.82.177, service 3300)
TIME Fri Jun 29 08:54:18 2007
RELEASE 640
COMPONENT NI (network interface)
VERSION 37
RC -10
MODULE nixxi_r.cpp
LINE 8715
DETAIL NiPConnect2
SYSTEM CALL SiPeekPendConn
ERRNO 10061
ERRNO TEXT WSAECONNREFUSED: Connection refused
COUN
 at com.sap.ide.jcb.core.service.connection.internal.ConnectionManager.connect(ConnectionManager.java:220)
 at com.sap.ide.jcb.core.service.connection.internal.ConnectionManager.connectToSingleServer(ConnectionManager.java:206)
 at com.sap.ide.jcb.core.wizardpages.SAPLogonPage.internalConnectToServer(SAPLogonPage.java:1769)
 at com.sap.ide.jcb.core.wizardpages.SAPLogonPage.access$2300(SAPLogonPage.java:46)
 at com.sap.ide.jcb.core.wizardpages.SAPLogonPage$9.run(SAPLogonPage.java:1730)
 at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
 at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:98)
 at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:1999)
 at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1733)
 at org.eclipse.jface.operation.ModalContext$ModalContextThread.block(ModalContext.java:136)
 at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:261)
 at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:758)
 at com.sap.ide.jcb.core.wizardpages.SAPLogonPage.connectToServer(SAPLogonPage.java:1699)
 at com.sap.ide.jcb.core.wizardpages.SAPLogonPage.performFinish(SAPLogonPage.java:1805)
 at com.sap.ide.webdynpro.modeleditor.wizards.model.creation.ModelWizard.initializeReimporter(ModelWizard.java:1410)
 at com.sap.ide.webdynpro.modeleditor.wizards.model.creation.ModelWizard.performPostSapLogonPageForReimport(ModelWizard.java:1433)
 at com.sap.ide.webdynpro.modeleditor.wizards.model.creation.ModelDialog.nextPressed(ModelDialog.java:85)
 at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:316)
 at org.eclipse.jface.dialogs.Dialog$1.widgetSelected(Dialog.java:423)
 at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89)
 at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:81)
 at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:840)
 at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2022)
 at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1729)
 at org.eclipse.jface.window.Window.runEventLoop(Window.java:583)
 at org.eclipse.jface.window.Window.open(Window.java:563)
 at com.sap.ide.webdynpro.modeleditor.ModelEditorCallback.reimportModel(ModelEditorCallback.java:218)
 at com.sap.ide.webdynpro.service.modeleditor.ModelService.reImportModel(ModelService.java:207)
 at com.sap.ide.webdynpro.service.modeleditor.ServiceWithUI.reImportModel(ServiceWithUI.java:120)
 at com.sap.ide.webdynpro.tsmodel.application.actions.ReimportModelAction.run(ReimportModelAction.java:11)
 at com.sap.ide.webdynpro.projectbrowser.actions.PBReimportModelAction.run(PBReimportModelAction.java:77)
 at com.sap.ide.webdynpro.projectbrowser.actions.PBDevelopmentObjectAction.runInternal(PBDevelopmentObjectAction.java:80)
 at com.sap.ide.webdynpro.projectbrowser.actions.PBDevelopmentObjectAction.run(PBDevelopmentObjectAction.java:61)
 at com.tssap.selena.model.extension.action.SelenaActionCollector$GenericElementActionWrapper.run(SelenaActionCollector.java:224)
 at com.tssap.util.ui.menu.MenuFactory$MuSiAction.saveRunAction(MenuFactory.java:1425)
 at com.tssap.util.ui.menu.MenuFactory$MuSiAction.run(MenuFactory.java:1407)
 at com.tssap.util.ui.menu.MenuFactory$DelegateAction.processInternal(MenuFactory.java:616)
 at com.tssap.util.ui.menu.MenuFactory$DelegateAction.access$100(MenuFactory.java:586)
 at com.tssap.util.ui.menu.MenuFactory$DelegateAction$BusyProcessWorker.run(MenuFactory.java:716)
 at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
 at com.tssap.util.ui.menu.MenuFactory$DelegateAction.process(MenuFactory.java:610)
 at com.tssap.util.ui.menu.internal.MenuListenerFactory$ProcessAdapter.widgetSelected(MenuListenerFactory.java:172)
 at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89)
 at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:81)
 at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:840)
 at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2022)
 at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1729)
 at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1402)
 at org.eclipse.ui.internal.Workbench.run(Workbench.java:1385)
 at com.tssap.util.startup.WBLauncher.run(WBLauncher.java:79)
 at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:858)
 at org.eclipse.core.boot.BootLoader.run(BootLoader.java:461)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at com.sap.ide.eclipse.startup.Main.basicRun(Main.java:291)
 at com.sap.ide.eclipse.startup.Main.run(Main.java:789)
 at com.sap.ide.eclipse.startup.Main.main(Main.java:607)
Caused by: com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: SAP_CMINIT3 : rc=20 > Connect to SAP gateway failed
Connect_PM GWHOST=test833, GWSERV=sapgw00, ASHOST=test833, SYSNR=00
LOCATION CPIC (TCP/IP) on local host
ERROR partner not reached (host 10.3.82.177, service 3300)
TIME Fri Jun 29 08:54:18 2007
RELEASE 640
COMPONENT NI (network interface)
VERSION 37
RC -10
MODULE nixxi_r.cpp
LINE 8715
DETAIL NiPConnect2
SYSTEM CALL SiPeekPendConn
ERRNO 10061
ERRNO TEXT WSAECONNREFUSED: Connection refused
COUN
 at com.sap.mw.jco.rfc.MiddlewareRFC$Client.nativeConnect(Native Method)
 at com.sap.mw.jco.rfc.MiddlewareRFC$Client.connect(MiddlewareRFC.java:1125)
 at com.sap.mw.jco.JCO$Client.connect(JCO.java:3138)
 at com.sap.ide.jcb.core.service.connection.internal.ConnectionManager.connect(ConnectionManager.java:216)[/code]
Can someone tell me problem..
Thanks in advance,
Vineeth

In service file if entry is not there... give the enty like
sapgw<Inst.No> 33<Inst.No>/tcp
sapgw<Inst.No>s 48<Inst.No>/tcp
where <Inst.No> = System Number of your R/3 system(00 or 01...)
In host file....
ip of the server name of the server....

Problem in using the RFC model in webdynpro aplication

Hi,
I am trying to access FM CRIF_GET_EMPLOYEE_FOR_USER from the backend system in webdynpro application in two different ways
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IRepository repository;
public int getPernr(String user)
int ret = 0;
String user = "SRESP5";
double pool = Math.random()*100000000;
//     the repository we gonna be using
try{
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JCO.addClientPool(
"DE1", //alias for this pool
100,
//     max. number of connections
"540", //SAP client
"", //userid
"", //password
"EN", //language
"sapde1ci.zrh.swissre.com", //host name
"10" //system number
//      Create a new repository
repository = JCO.createRepository(
"MYRepository", "DE1");
wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess(
     "ExceptionwwwwwwxSS");
catch(JCO.Exception ex) {
wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess(
"Exceptionwwwwwwx"+ex.getMessage());
JCO.Client client =
null;
try{
//      Get a function template from the repository
     wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess(
     "SSS");
//     wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess("ExceptWWWW");
JCO.Function function = repository.getFunctionTemplate(
"Z_CRIF_GET_EMPLOYEE_FOR_USER").getFunction();
wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess(
     "ddd"+function);
     wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess("ExceptioWWW");
//      Fill in input parameters
JCO.ParameterList input = function.getImportParameterList();
input.setValue(user,
"USER_NAME" );
//     input.setValue(String.valueOf(new Date()), "BEGINDATE" );
//     input.setValue(String.valueOf(new Date()), "ENDDATE" );
//      Get a client from the pool
     wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess("ExceptionQQ");
client = JCO.getClient(
"DE1");
//     wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess("Exception");
//      Execute function the remote system
try{
   client.execute(function);
}catch(Exception e){
     wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess("dd"+e.getMessage());
wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess(
   "Exceptionw");
//      Print return message
ret=function.getExportParameterList().getInt(
"EMPLOYEENUMBER");
System.out.println(
"3");
System.out.println(
"RETURN MESSAGE: " + ret);
wdThis.wdGetAPI().getComponent().getMessageManager().reportSuccess(
     "SSSWSS");
catch(Exception ex) {
System.out.println(
"Caught an exception333: " + ex);
finally{
//      Always release client !!!
//JCO.releaseClient(client);
JCO.removeClientPool("DE1");
//     try
return ret;
it is returning the PERNR of the username passed as an input parameter.
2.But when I am trying to use an adaptive RFC model and it is giving NO_EMPLOYEENUMBER_FOUND
here is the code
in view
public void wdDoInit()
    //@@begin wdDoInit()
     wdThis.wdGetTestAppController().executeBapi();
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In Controller
public void wdDoInit()
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          input.setUser_Name("SRESP5");
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public void executeBapi( )
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     try{
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please help me in solving this issue.points will be awarded for sure for the helpful answer.
Bala

Hi,
Change this line of code:
wdContext.nodeZ_cr().bind(input);
to
wdContext.nodeZ_Crif_Get_Employee_For_User_Input().bind(input);
Try executing your application now.
Regards,
Murtuza

Error while creating a Adaptive RFC Model

Hi all,
I am trying to create a Model using a Adaptive RFC Model, I assign a Model name and the logical system names, enter the details in SAP Logon Information for the Single server,here it gives me a Gateway error. What could be the issue here?
NB: In the Host Name , I tried with both the Host name of the r/3 server and also with the SAProuter string ( as we have the server at other place) ,still it doesnt work. and I am able to login to the R/3 system from the SAPLogon GUI from my desktop normally.
Is there any issue of the firewall related to this, if so whats the port number that should be opened so that i can connect to the r/3 system get the list of BAPIs present there into my Webdynpro application .
Need help on this
Regards,
Vijay

Hi Lohi n Gopi ,
I have checked out with the your given suggestion of trying with the host name as well as IP address and also typing all the details,without copy pasting the details . In both the cases it gave the " Connect to gateway failed " error mesg.
But one intersting thing here that i observered when trying with hostname, IP address, or SAProuter string is as follows .
with IP address
Connect to SAP gateway failed
Connect_PM GWHOST="ipaddress",GWSERV=sapgw10,ASHOST="ipaddress",SYSNR=10
LOCATION CPIC(TCP/IP) on local host
ERROR patner not reached(host "ipaddress",service=3310)
with SAProuterString
Connect to SAP gateway failed
Connect_PM GWHOST="SAProuterString",GWSERV=sapgw10,ASHOST="SAProuterString",SYSNR=10
LOCATION SAPRouter on " some HostName"
ERROR hostname unknown
with HostName
Connect to SAP gateway failed
Connect_PM GWHOST="hostname",GWSERV=sapgw10,ASHOST="hostname",SYSNR=10
LOCATION CPIC(TCP/IP) on local host
ERROR hostname "hostname " unknown
Is there any firewall port blocking issue here ?if so , whats the port that needs to be opened ?
Appreciate your help.
Thnks,
NR

Error while creating adaptive RFC model

Dear All,
I am trying to create Adaptive RFC model by which i can fetch data from R/3 trough BAPI and display on the webDynpro UI.
I am getting error
Exception: org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'
JCO.nativeInit(): Could not initialize dynamic link library librfc. Found version "640.0.55" but required at least version "640.0.76".)
Kindly suggest.
Thanks
Ashish

Hi,
Check this link....
com.sap.mw.jco.JCO$Exception (104) RFC_ERROR_SYSTEM_FAILURE

Nullpointer exception in SAP code (RFC model related)

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