Null pointer exception when running OAF page

Question

Hi
I am getting null pointer exception when i execute the code below.
OAApplicationModule am = oapagecontext.getRootApplicationModule();
OAApplicationModuleImpl childam = (OAApplicationModuleImpl)am.findApplicationModule("QuestAnswerAM");
oapagecontext.putDialogMessage(new OAException("PER", "XXOM_APPR_OVR_NULL_MSG"+am+childam, null, OAException.ERROR, null));
OAViewObjectImpl VO= (OAViewObjectImpl)childam.findViewObject("QuestDetailsVO") ;
OAViewRowImpl Dff1Row = (OAViewRowImpl)VO.getCurrentRow();
quest = Dff1Row.getAttribute("LastUpdateDate");
I later commented out the last 3 lines and used the code below to track the application module name.
OAApplicationModule am = oapagecontext.getRootApplicationModule();
OAApplicationModuleImpl childam = (OAApplicationModuleImpl)am.findApplicationModule("QuestAnswerAM");
oapagecontext.putDialogMessage(new OAException("PER", "XXOM_APPR_OVR_NULL_MSG"+am+childam, null, OAException.ERROR, null));
When i run the page i am getting this error:
Message not found. Application: PER, Message Name: XXOM_APPR_OVR_NULL_MSGoracle.apps.per.selfservice.appraisals.server.AppraisalsAMImpl@2982bfnull.
the above error indicates that the Root application module is AppraisalsAMImpl.
But the view i need that is QuestDetailsVO exists in a child AM that is QuestAnswerAM. However in the above diag message as you can see it returns child AM to be null.
When i click on About this page it clearly says that the QuestDetailsVO exists in QuestAnswerAM
Please help
Thanks
Ashish

Answer 1

Hi
Thanks for the quick response.
I am fine with the error message:
Message not found. Application: PER, Message Name: XXOM_APPR_OVR_NULL_MSGoracle.apps.per.selfservice.appraisals.server.AppraisalsAMImpl@2982bfnull.
I am getting message not found becos I have registered only XXOM_APPR_OVR_NULL_MSG and am displaying '+am+childam' also in the exception which is not associated with the registered message.
See below.
oapagecontext.putDialogMessage(new OAException("PER", "XXOM_APPR_OVR_NULL_MSG"+am+childam, null, OAException.ERROR, null));
I am fine with that. My concern is in the error above for 'am' part i am getting the root appl module name. but for childam i am getting null
Message not found. Application: PER, Message Name: XXOM_APPR_OVR_NULL_MSGoracle.apps.per.selfservice.appraisals.server.AppraisalsAMImpl@2982bf*null*.
See the high lighted.
I will look into the current row returning -1 issue and get back to you./
Thanks
Ashish