Getting nullpointer Exception in Webdynpro application.

[Former Member]

hi All,

I am getting one NullPointerException in the screen, .

This message is only coming only when the form is loading first time. So when i put the debugg statments to trace the error where it is coming, i come to know that it is coming before calling the init() method.

So when i click on the any of the button or firing the event in the screen, , i am not getting that error in the screen. Can u please tell me anybody , what would be the problem.s

for your reference i have added that screen shot in the in the following path. Please look at the same. It is production. i am not able to find the problem, could any body help to find what is the problem.

My Home > Web Dynpro Java > Main > Attachments

file name is > NullPointerException Easy.GIF

Is this error coming any of the life cycle methods creating internally by webdynpro framework.?

What is the lifecycle process of the webdynpro application.

Regards

Vijay

[luciano_leitedasilva]

Hi Vishal,

This NullPointerException is happing in either the view init method or controller init method. Have a look at this two methods...

Where is the code print this exception? I'm 100% sure that isn't standard web dynpro functionality print this message.

<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/13/aeeb41eda96624e10000000a1550b0/frameset.htm">The lifecycle process of the webdynpro application.</a>

Regards,

Luciano

[Former Member]

Hi Luciano ,

thanks for the reply

I have put the debugg statments also in the component contoller and custom controller init methods.

After that when i run the application it is throwing the exception in the component controller inbetween init() and wdDoBeforeNavigation() methods.

For your reference i have attached screen shot in the following path. under wiki

My Home > Web Dynpro Java > Main > Attachments

Filename is > NullPointerException Easy1.GIF

Acutally i was not able to provide the stract trace bcz , when i went the log files i am not finding any exception or error.

Regards

Vijay

[luciano_leitedasilva]

Vishal

Can you post the code of the controller's init method?

I belive that the error can be inside it.

Regards,

Luciano

[Former Member]

Hi Luciano,

Thanks for the quick reply.

In the component controller , there is no has written, for this error debugging purupose, i have put the debugging statements in all the methods in component controller. Only following statement in all the methods in the component contrller.

wdComponentAPI.getMessageManager().reportSuccess(" Component Controller wdDoBeforeNavigation()----

---

>");

i am not able to find where is the problem it is throwing the Nullpointer exception.

Regards

Vijay

Regards

Vijay.

[luciano_leitedasilva]

Vishal,

So, I'm sure that there is any mistake in your code. Try see all point where you write this code: "wdComponentAPI.getMessageManager().reportSuccess".

In any place the code is printing a exception.

Try post the init method code.

Regards,

Luciano

[Former Member]

Hi

I am not undertstanding what u are telling. Now there is nothing in the init() method of controller, bcz i have commented that 'wdComponentAPI.getMessageManager().reportSuccess' code also.

So , what is the mean of 'Try post the init method code' means...

Regards

Vijay

[abhijeet_mukkawar]

Hi,

what is you application about? Does it deal with external mapping, or other component?

if you comment the code in component controller , are you still getting the exception?

post all the code written in compoenent controller' init() as well as custome controllers init() if it is present ..

regards

[Former Member]

Hi Vishal,

Could you explain a bit clear as to what you are trying to do and where are you getting error. If possible attach the error stack trace.

Thanks