Access via 'NULL'

[Former Member]

Hi,

I am getting this error. I dont know why.

Plese help. Thx in advance for your kindly efforts.

Regards

ertas

The following error text was processed in the system I60 : Access via 'NULL' object reference not possible. 
The error occurred on the application server apssap15_I60_00 and in the work process 0 . 
The termination type was: RABAX_STATE 
The ABAP call stack was: 
Method: WDDOMODIFYVIEW of program /1BCWDY/5NRD5TKGE1K9JUDKWN52==CP
Method: IF_WDR_VIEW_DELEGATE~WD_DO_MODIFY_VIEW of program /1BCWDY/5NRD5TKGE1K9JUDKWN52==CP
Method: DO_MODIFY_VIEW of program CL_WDR_DELEGATING_VIEW========CP
Method: MODIFY_VIEW of program CL_WDR_VIEW===================CP
Method: DO_MODIFY_VIEW of program CL_WDR_CLIENT_COMPONENT=======CP
Method: DO_MODIFY_VIEW of program CL_WDR_WINDOW_PHASE_MODEL=====CP
Method: PROCESS_REQUEST of program CL_WDR_WINDOW_PHASE_MODEL=====CP
Method: PROCESS_REQUEST of program CL_WDR_WINDOW=================CP
Method: EXECUTE of program CL_WDR_MAIN_TASK==============CP
Method: IF_WDR_RUNTIME~EXECUTE of program CL_WDR_MAIN_TASK==============CP

I only have programmed the following code into views WDDOMODIFYVIEW

method WDDOMODIFYVIEW .

data lr_textview type ref to cl_wd_text_view.
data lr_flow_data type ref to cl_wd_flow_data.
data lr_container type ref to cl_wd_transparent_container.

IF first_time EQ 'X'.
lr_textview = cl_wd_text_view=>new_text_view( id  = 'TXV_TOPIC'
                                              view = view
                                              text = 'Hello !' ).
lr_flow_data = cl_wd_flow_data=>new_flow_data( element = lr_textview ).
lr_container->add_child( lr_textview ) .
ENDIF.

endmethod.

Edited by: Ilhan Ertas on May 11, 2009 7:00 PM

[arjun_thakur · Accepted solution]

Hi,

In your code, lr_container doesn't contain any value. That is why it is giving a dump message.

Use this statement

LR_CONTAINER ?= view->GET_ELEMENT( 'ROOTUIELEMENTCONTAINER' ). " pass the name of container in which you want to insert the UI element 

And your code will look like:

data lr_textview type ref to cl_wd_text_view.
data lr_flow_data type ref to cl_wd_flow_data.
data lr_container type ref to cl_wd_transparent_container.
 
IF first_time EQ 'X'.
lr_textview = cl_wd_text_view=>new_text_view( id  = 'TXV_TOPIC'
                                              view = view
                                              text = 'Hello !' ).
lr_flow_data = cl_wd_flow_data=>new_flow_data( element = lr_textview ).
LR_CONTAINER ?= view->GET_ELEMENT( 'ROOTUIELEMENTCONTAINER' ).
lr_container->add_child( lr_textview ) .

I hope it helps.

Regards

Arjun