Short Dump raised when clicking the own toolbar button in OO ALV Tree View

Hi All,

I am doing the Tree View in OO ALV.

I have kept my own delete button on toolbar.

Now when i am pressing the button at that time

i am getting the short dump for the following:

A RAISE statement in the program "CL_GUI_TOOLBAR================CP" raised the

exception

condition "CNTB_ERROR_FCODE".

Since the exception was not intercepted by a superior

program, processing was terminated.

Trigger Location of Runtime Error

Program CL_GUI_TOOLBAR================CP

Include CL_GUI_TOOLBAR================CM002

Row 32

Module type (METHOD)

Module Name ADD_BUTTON

So pls help me out.

Regards,

DS