oracle的表单找不到,做oracle form tab canvas的时候遇到的问题(frm-41053:找不到画布)...

当我打开form的时候，可以显示，但是点击旁边的tab page的时候报frm-41053:找不到画布，无效的ID,怎么调试都不行，那位给一个意见，谢谢了

/*==========================================================

**

** PROCEDURE:         line_tab()

**

**=========================================================*/

procedure line_tab(event in varchar2) is

curr_canvas_name varchar2(30) := get_item_property(:system.cursor_item,

item_canvas);

current_tab        varchar2(30) := get_canvas_property('LINE_TAB',

topmost_tab_page);

target_canvas_name varchar2(30) := :system.tab_new_page;

begin

if (event = 'WHEN-TAB-PAGE-CHANGED') then

if curr_canvas_name in ('MAIN') then

show_view(target_canvas_name);

go_item(:system.cursor_item);

else

validate(item_scope);

if not form_success then

set_canvas_property('LINE_TAB',topmost_tab_page, :system.tab_previous_page);

return;

end if;

if target_canvas_name = 'LINE_MAIN' then

go_item('ORDER_LINES.ITEM_CODE');

elsif target_canvas_name = 'LINE_ADDITION' then

go_item('ORDER_LINES.ADDITION1');

elsif target_canvas_name = 'LINE_OTHERS' then

go_item('ORDER_LINES.OTHER1');

end if;

end if;

elsif (event = 'WHEN-NEW-ITEM-INSTANCE') then

if ((curr_canvas_name in ('LINE_MAIN','LINE_ADDITION','LINE_OTHERS')) and        (curr_canvas_name != current_tab)) then

set_canvas_property('LINE_TAB',topmost_tab_page,curr_canvas_name);

end if;

elsif (event = 'INIT') then

show_view('LINE_TAB');

show_view('LINE_FIXED');

hide_view('LINE_OTHERS');

hide_view('LINE_ADDITION');

show_view('LINE_MAIN');

else

app_exception.invalid_argument('LINE_TAB',

'EVENT', event);

end if;

end line_tab;

[本帖最后由 ponky 于 2010-5-20 11:28 编辑]

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2010-5-20 11:28 上传