failed to create or init instance of model in scope TASK_SCOPE

[Former Member]

Hi All,

When I execute an adaptive RFC Model using WD Java application I receive the following error -

failed to create or init instance of model 'com.sap.tc.webdynpro.progmodel.model.core.Model' in scope TASK_SCOPE with instanceId 'null'

What can be the problem?

Any help is highly appreciated.

Thanks,

Divya

[Former Member]

Hi Divya,

I feel the error is in 1st line itself. It seems the factory class is not able to create a model instance of scope type TASK_SCOPE.

Try to create an instance with the default APPLICATION_SCOPE. (You can refer ppt slide 39 for different possible model instance scope https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/705f2b2e-e77d-2b10-de8a-95f37f4c...

Or alternatively create model instance directly - Model model = new Model();

Kind Regards,

Nitin

[Former Member]

Thank you all. I had to restart the J2EE server and also have the cache refreshed to have this resolved.

[Former Member]

Hi Divya,

We are also facing the same problem in Production environment.we restarted the J2EE engine, but the prob still remains. Can you plz tell which cache needs to be cleared. I mean can you tell the process of clearing the cache.

Thanks.

Sonali.

[Former Member]

Hii,

I think you should debug the application by setting a break-point at the ABAP code.Then only you will be able to trace where the flow is exactly going wrong.Sit with your ABAPer and debug....

[Former Member]

Hii,

Did u create a instane of the model in wdDoInit() method of custom controller like :

wdContext.nodeZsm_Calc_Csi_Report_Input().bind(new Zsm_Calc_Csi_Report_Input());

Please check with that.

[Former Member]

Yes I did This is what I have

Model model = (Model)WDModelFactory.getModelInstance(Model.class,WDModelScopeType.TASK_SCOPE);

Zmhcr_Bapi_Contexto_Webdynpro_Input modelObject = (Zmhcr_Bapi_Contexto_Webdynpro_Input)model.createModelObject(Zmhcr_Bapi_Contexto_Webdynpro_Input.class);

wdContext.nodeZmhcr_Bapi_Contexto_Webdynpro_Input().bind(modelObject);

modelObject.setTP(bpContext.getBp());

modelObject.setTT(tType);

modelObject.setI_Claveobc(coType);

wdContext.currentZmhcr_Bapi_Contexto_Webdynpro_InputElement().modelObject().execute();

What can be wrong? This working fine. But, I am having all weird errors after the input parameters in the backend BAPI changed and I reimported the model.

Any help is highly appreciated.

Thanks,

Divya

[former_member197348]

Hi Divya,

Try like this:

Model model = (Model)WDModelFactory.getModelInstance(Model.class,WDModelScopeType.TASK_SCOPE);
Zmhcr_Bapi_Contexto_Webdynpro_Input modelObject = new Zmhcr_Bapi_Contexto_Webdynpro_Input();
wdContext.nodeZmhcr_Bapi_Contexto_Webdynpro_Input().bind(modelObject);
modelObject.setTP(bpContext.getBp());
modelObject.setTT(tType);
modelObject.setI_Claveobc(coType); 
wdContext.currentZmhcr_Bapi_Contexto_Webdynpro_InputElement().modelObject().execute();

Please mention where exactly you are getting error (line ), if it doesn't solve your issue.

Regards,

Siva