topic Re: Access via 'NULL' object reference not possible. in Application Development and Automation Discussions

Access via 'NULL' object reference not possible.

nbitish — Mon, 17 Dec 2018 04:55:11 GMT

PROGRAM  ZNB_CLASS_MOD_POO_IMP.
  DATA LV_MESSAGE TYPE BAPIRET2.
  DATA OBJ TYPE REF TO ZCL_NB_CLASS.
  DATA TRANS_BALANCE TYPE DMBTR.
  DATA BAL TYPE DMBTR.
  DATA BALANCE_LEFT TYPE DMBTR.
  DATA ok_code TYPE sy-ucomm.
DATA  LT_MESSAGE TYPE TABLE OF BAPIRET2.
START-OF-SELECTION.
CREATE OBJECT OBJ ."TYPE ZCL_NB_CLASS.
INCLUDE ZNB_CLASS_MOD_POO_IMP_STATUO01.
INCLUDE ZNB_CLASS_MOD_PAI.

Hi Everyone,

I am getting the null object reference error while I have to declare the object globally. Please help,

I my class code would be required, I will post that.

Re: Access via 'NULL' object reference not possible.

Muthu_raja — Mon, 17 Dec 2018 05:50:50 GMT

Hi Nitish,

I think, You are calling corresponding methods of your class ZCL_NB_CLASS without any instance. Kindly check in debugging wheather object has been instantiated ( OBJ ) when calling methods.

Re: Access via 'NULL' object reference not possible.

matt — Mon, 17 Dec 2018 08:18:19 GMT

Thank-you for properly formatting your program code. Much easier to read.

At what line are you getting the dump? Is it in the code you've posted, or is it in one of the includes?

Re: Access via 'NULL' object reference not possible.

DoanManhQuynh — Mon, 17 Dec 2018 08:51:10 GMT

where are you calling screen?

Re: Access via 'NULL' object reference not possible.

nbitish — Mon, 17 Dec 2018 10:22:49 GMT

Hi Mathew,

I am getting the error in the includes, ie., the place at which I am calling the method

in PAI.

Re: Access via 'NULL' object reference not possible.

matt — Mon, 17 Dec 2018 11:42:56 GMT

In the PAI you've got a bit of code like OBJ->DO_PAI( ). But at this point, OBJ is not instantiated. The solution depends on what you are trying to achieve, and the structure of your program.

OBJ is a terrible name for an object reference.

ZCL_NB_CLASS is a terrible name for a class.

Re: Access via 'NULL' object reference not possible.

nbitish — Mon, 17 Dec 2018 15:00:22 GMT

Yeah, you are right. I was just practicing, that's why I did that.

Re: Access via 'NULL' object reference not possible.

nbitish — Mon, 17 Dec 2018 15:02:27 GMT

I just want to know, where should I declare the object globally for multiple screens?

Re: Access via 'NULL' object reference not possible.

Former Member — Mon, 17 Dec 2018 16:10:08 GMT

Use a function group

Re: Access via 'NULL' object reference not possible.

matt — Mon, 17 Dec 2018 18:19:21 GMT

I can't tell you as... "The solution depends on what you are trying to achieve, and the structure of your program."