# MovieClip custom property lost in onRelease func?

**URL:** <https://forum.kirupa.com/t/movieclip-custom-property-lost-in-onrelease-func/205823>\
**Category:** flash\
**Created:** [November 2, 2006, 9:24am UTC](https://forum.kirupa.com/t/movieclip-custom-property-lost-in-onrelease-func/205823 "2006-11-02T09:24:58Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![joakimlinden](https://avatars.discourse-cdn.com/v4/letter/j/51bf81/32.png) [@joakimlinden](https://forum.kirupa.com/u/joakimlinden)\
**Post date:** [November 2, 2006, 9:24am UTC](https://forum.kirupa.com/t/movieclip-custom-property-lost-in-onrelease-func/205823/1 "2006-11-02T09:24:58Z")

</div>

I’m trying to assign a custom property to an attached MC. In this case it’s an ID number, but it’s always undefined inside the onRelease function… What am I missing?

```
 ActionScript Code:
 [FONT=Courier New][LEFT][COLOR=#000000] **function** [/COLOR] blablaMethod[COLOR=#000000]([/COLOR][COLOR=#000000])[/COLOR][COLOR=#000000]{[/COLOR][INDENT][COLOR=#0000ff]_root[/COLOR].[COLOR=#0000ff]attachMovie[/COLOR][COLOR=#000000]([/COLOR][COLOR=#ff0000]"bla"[/COLOR], [COLOR=#ff0000]"bla"[/COLOR]+someIncrementingId, [COLOR=#0000ff]_root[/COLOR].[COLOR=#0000ff]getNextHighestDepth[/COLOR][COLOR=#000000]([/COLOR][COLOR=#000000])[/COLOR][COLOR=#000000])[/COLOR];

```

[/INDENT][INDENT][COLOR=#000000] **var** [/COLOR] mcReference = [COLOR=#0000ff]\_root[/COLOR][COLOR=#000000][[/COLOR][COLOR=#ff0000]“bla”[/COLOR]+someIncrementingId[COLOR=#000000]][/COLOR];  
[/INDENT][INDENT][COLOR=#808080]_// I’ve also tried the following:_[/COLOR]  
[/INDENT][INDENT][COLOR=#000000] **var** [/COLOR] mcReference = [COLOR=#0000ff]\_root[/COLOR].[COLOR=#0000ff]attachMovie[/COLOR][COLOR=#000000]([/COLOR][COLOR=#ff0000]“bla”[/COLOR], [COLOR=#ff0000]“bla”[/COLOR]+[COLOR=#0000ff]number[/COLOR], [COLOR=#0000ff]\_root[/COLOR].[COLOR=#0000ff]getNextHighestDepth[/COLOR]COLOR=#000000[/COLOR][COLOR=#000000])[/COLOR];  
mcReference.[COLOR=#000080]idNum[/COLOR] = someNumber;  
[COLOR=#808080]_// some code for positioning the clip_[/COLOR]  
[COLOR=#808080]_// some more code, then:_[/COLOR]  
[/INDENT][INDENT]mcReference.[COLOR=#0000ff]onRelease[/COLOR] = [COLOR=#000000] **function** [/COLOR]COLOR=#000000[/COLOR][COLOR=#000000]{[/COLOR][INDENT][COLOR=#808080]_// this traces undefined:_[/COLOR]  
[COLOR=#0000ff]trace[/COLOR]COLOR=#000000[/COLOR];  
[COLOR=#808080]_// this as well:_[/COLOR]  
[COLOR=#0000ff]trace[/COLOR]COLOR=#000000[/COLOR];  
[COLOR=#808080]_// and this:_[/COLOR]  
[COLOR=#0000ff]trace[/COLOR]COLOR=#000000[/COLOR];  
[/INDENT][/INDENT][INDENT][COLOR=#000000]}[/COLOR]  
[/INDENT][COLOR=#000000]}

[/COLOR] [/LEFT]  
[/FONT]