oops report

[Former Member]

Hi firends,

I have created simple ooops report . its going dump . It is saying that "Access via 'NULL' object reference not possible." Please rectify this code.

The copde is below:

&----

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*& Report YCLASS_OOPS_BANK

*&

&----

---

*&

*&

&----

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REPORT yclass_oops_bank.

DATA: act TYPE REF TO zaccountaa.

DATA: bal TYPE i.

SELECTION-SCREEN BEGIN OF BLOCK a. .

PARAMETERS: p_amnt TYPE dmbtr,

p_dep TYPE dmbtr,

p_witd TYPE dmbtr.

SELECTION-SCREEN END OF BLOCK a.

START-OF-SELECTION.

clear act.

CALL METHOD act->set_balance( p_amnt ).

WRITE:/ 'SET BALANCE', p_amnt.

bal = act->deposit( p_dep ).

write:/ 'Deposited ', p_dep ,' bucks making balance to ', bal.

bal = act->withdraw( p_witd ).

write:/ 'Withdrew ', p_witd ,' bucks making balance to ', bal.

thnaks

vvv

[Former Member]

Hi ,

u have to add a statement Create object act. before calling method.

Because this statement creates a instanst and ref is create only when you use this statement,

Reward Points .

raj

[Former Member]

DATA: bal TYPE i.

SELECTION-SCREEN BEGIN OF BLOCK a. .

PARAMETERS: p_amnt TYPE dmbtr,

p_dep TYPE dmbtr,

p_witd TYPE dmbtr.

SELECTION-SCREEN END OF BLOCK a.

START-OF-SELECTION.

DATA: act TYPE REF TO zaccountaa.

create object act.

clear act.

CALL METHOD act->set_balance( p_amnt ).

WRITE:/ 'SET BALANCE', p_amnt.

bal = act->deposit( p_dep ).

write:/ 'Deposited ', p_dep ,' bucks making balance to ', bal.

bal = act->withdraw( p_witd ).

write:/ 'Withdrew ', p_witd ,' bucks making balance to ', bal.

[Former Member]

thanks

[Former Member]

Hi,

There are 2 problems here.

&----

---

*& Report YCLASS_OOPS_BANK

*&

&----

---

*&

*&

&----

---

REPORT yclass_oops_bank.

DATA: act TYPE REF TO zaccountaa.

DATA: bal TYPE i.

SELECTION-SCREEN BEGIN OF BLOCK a. .

PARAMETERS: p_amnt TYPE dmbtr,

p_dep TYPE dmbtr,

p_witd TYPE dmbtr.

SELECTION-SCREEN END OF BLOCK a.

START-OF-SELECTION.

create object act. -

---

> First you should create the object.

clear act. -

---

> This is not required.

IF act is bound. -

---

> In any object related code you can have a check like this to avoid dumps.

the below code is called only if act is not initial.

CALL METHOD act->set_balance( p_amnt ).

WRITE:/ 'SET BALANCE', p_amnt.

bal = act->deposit( p_dep ).

write:/ 'Deposited ', p_dep ,' bucks making balance to ', bal.

bal = act->withdraw( p_witd ).

write:/ 'Withdrew ', p_witd ,' bucks making balance to ', bal.

ENDIF.

I hope this helps.

thnaks

Saurabh

[Former Member]

creat a container object

call screen 100

after selection criteria

creat customer contorl provide name CONTAINER or some thing else and then

in top DATA container TYPE REF TO cl_gui_custom_container.

in pbo

CREATE OBJECT container

EXPORTING container_name = 'CONTAINER'.

now u can can use output in this container it can be a simple report or any thing