Error when inserting or changing in a sorted table

Question

Hi Experts,
When i am executing a webdynpro application it says Error when inserting or changing in a sorted table. Can any one help for this.
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: GET_CATEGORY_LIST of program /1BCWDY/F9XHYWN4WKNMG4CDUGA8==CP
Method: IF_COMPONENTCONTROLLER~GET_CATEGORY_LIST of program /1BCWDY/F9XHYWN4WKNMG4CDUGA8==CP
Method: WDDOMODIFYVIEW of program /1BCWDY/F9XHYWN4WKNMG4CDUGA8==CP
Method: IF_WDR_VIEW_DELEGATE~WD_DO_MODIFY_VIEW of program /1BCWDY/F9XHYWN4WKNMG4CDUGA8==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
in ST22
Object Definition
  DATA: lo_node                   TYPE REF TO if_wd_context_node,
        lo_node_info              TYPE REF TO if_wd_context_node_info,
        lo_element                TYPE REF TO if_wd_context_element.
Additional Data declarations
  DATA: lv_key TYPE string.
Get context node.
  lo_node = wd_context->get_child_node( name = 'DROPDOWNLISTS' ).
  lo_node_info = lo_node->get_node_info( ).
Call method to fetch the categories.
  CALL METHOD cl_hap_wd_start_page_ui=>category_get_list
    EXPORTING
      add_on_application = add_on_application
    IMPORTING
      t_categories       = lt_categories.
Append Default selection entry 'All'.
  lw_category-category_id = '00000000'.
  lw_category-category_name = 'All'.
  APPEND lw_category TO lt_categories.
Sort table after appending the new entry.
  SORT lt_categories ASCENDING.
Loop through the category list and populate key(category_id) value(category_name) pair for
  LOOP AT lt_categories INTO lw_category.
    lw_key_value-key = lw_category-category_id.
  625     lw_key_value-value = lw_category-category_name.
>>>>>     APPEND lw_key_value TO lt_key_values.------>Here it throws an error
  627     CLEAR: lw_key_value, lw_category.
  628   ENDLOOP.
  629
  630 * Bind the category key-value pair to the context attribute.
  631   CALL METHOD lo_node_info->set_attribute_value_set
  632     EXPORTING
  633       name      = 'CATEGORY_LIST'
  634       value_set = lt_key_values.
  635
  636 * Make the entry 'All' as default selected.
  637   CALL METHOD lo_node->set_attribute
  638     EXPORTING
  639       value = '00000000'
  640       name  = 'CATEGORY_LIST'.
  641
  642 ENDMETHOD.
  643
  644 method GET_EMPLOYEES.
  645

Answer 1

Hello Durga,
from the error what I understood is lt_key_values is a sorted table and you are trying append a new line to it. Incase of sorted table you need to use the INSERT statement and not the APPEND statement.
INSERT lw_key_value INTO table lt_key_values.
BR, Saravanan