actionscript 3 - ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller -

i trying rid of object it's throwing error not sure problem.

the error getting:

argumenterror: error #2025: supplied displayobject must child of caller.     @ flash.display::displayobjectcontainer/removechild()     @ schoolbook_final_fla::maintimeline/garbage_cl_2()[schoolbook_final_fla.maintimeline::frame2:98]     @ function/schoolbook_final_fla:maintimeline/choice_play_ev/schoolbook_final_fla:play_target()[schoolbook_final_fla.maintimeline::frame2:81] 

my code:

import flash.display.sprite; import flash.ui.mouse; import flash.events.event;  var week_pick:weekday_choice = new weekday_choice (); var weekdayarray: array = new array (); var monday:mon_d_but = new mon_d_but (); var tuesday:tues_d_but = new tues_d_but (); var wednesday:wed_d_but = new wed_d_but (); var thursday:thurs_d_but = new thurs_d_but (); var friday:fri_d_but = new fri_d_but (); var choice_play: array = new array ();  choice_play.push(monday, tuesday, wednesday, thursday, friday); //adding week pick addchild(week_pick); //placing buttons choice_play[0].x = 73.1; choice_play[0].y = 316.75;  choice_play[1].x = 251.9; choice_play[1].y = 278.35;  choice_play[2].x = 399.95; choice_play[2].y = 375.85;  choice_play[3].x = 345.2; choice_play[3].y = 602.4;  choice_play[4].x = 80.15; choice_play[4].y = 603.05;  (var = 0; < choice_play.length; a++) {     //asking buttons stop     choice_play[a].alpha = 0;     choice_play[a].stop(); } //event week pick start week_pick.addeventlistener(event.enter_frame, moveon); //getting function started function moveon(event:event) {     if (week_pick.currentframe == 103)     {          week_pick.stop();         (a = 0; < choice_play.length; a++)         {             addchild(choice_play [a]);          }         //adding event listener clicking buttons         this.addeventlistener(mouseevent.click,choice_play_ev);       } }  function choice_play_ev(play_event: mouseevent) {     trace ("event gets added");     trace (play_event.target);     //work if target isn't background clip     if (play_event.target != week_pick)     {         trace (play_event.target);         //turn opacity ever cliked on         play_event.target.alpha = 1;         //asking choice play it's animation         play_event.target.addeventlistener(event.enter_frame, play_target);         this.removeeventlistener(mouseevent.click,choice_play_ev);         function play_target(play_event_cl:event)         {              play_event_cl.target.play ();             if (play_event_cl.target.currentframe == 15)             {                 //remove [;ace event listener once animation done                 play_event.target.removeeventlistener(event.enter_frame, play_target);                 garbage_cl_2 ();             }         }     } }  function garbage_cl_2 () {      trace("it works");     (a = 0; < choice_play.length; a++)     {         //remove choices display list         removechild(choice_play [a]);     }     //remove choices array better garbage cleaning     choice_play.splice(0, choice_play.length);     removechild(week_pick);     week_pick.removeeventlistener(event.enter_frame, moveon);     trace("the choice_play " + choice_play.length);     gotoandstop(3);  } 

can me out please? tell me why throwing error?

your loop inside garbage_cl_2 () function

for (a = 0; < choice_play.length; a++) {     //remove choices display list     removechild(choice_play [a]); } 

and / or call removechild(week_pick); tries remove movieclip that's not direct child of current movieclip object. current clip 1 timeline contains frame code of garbage_cl_2 () function. removechild() method can remove direct child of displayobjectcontainer instance - if current clip not direct parent of these clips, need specify parent clip so:

parentclip.removechild ( ... );