# Creating an instance name dynamically in flash, easy? but not working!

**URL:** <https://forum.kirupa.com/t/creating-an-instance-name-dynamically-in-flash-easy-but-not-working/184909>\
**Category:** flash\
**Created:** [April 9, 2006, 1:23am UTC](https://forum.kirupa.com/t/creating-an-instance-name-dynamically-in-flash-easy-but-not-working/184909 "2006-04-09T01:23:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![devinstar](https://avatars.discourse-cdn.com/v4/letter/d/e495f1/32.png) [@devinstar](https://forum.kirupa.com/u/devinstar)\
**Post date:** [April 9, 2006, 1:23am UTC](https://forum.kirupa.com/t/creating-an-instance-name-dynamically-in-flash-easy-but-not-working/184909/1 "2006-04-09T01:23:24Z")

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This is my Code

targetMC = [“img\_mc” + i];

infoTotal = targetMC.getBytesTotal()

How come when I use

img\_mc0.getBytesTotal() it works

but not when I use

targetMC.getBytesTotal()

it returns NaN, even tho targetMC = img\_mc0

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<div class="post-metadata">

**Author:** ![nathan99](https://avatars.discourse-cdn.com/v4/letter/n/96bed5/32.png) [@nathan99](https://forum.kirupa.com/u/nathan99)\
**Post date:** [April 9, 2006, 3:47am UTC](https://forum.kirupa.com/t/creating-an-instance-name-dynamically-in-flash-easy-but-not-working/184909/2 "2006-04-09T03:47:55Z")

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\_root[“img\_mc” + i];

?

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<div class="post-metadata">

**Author:** ![Greggeh](https://avatars.discourse-cdn.com/v4/letter/g/8baadc/32.png) [@Greggeh](https://forum.kirupa.com/u/Greggeh)\
**Post date:** [April 9, 2006, 10:50am UTC](https://forum.kirupa.com/t/creating-an-instance-name-dynamically-in-flash-easy-but-not-working/184909/3 "2006-04-09T10:50:42Z")

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define i first:

> var i:Number = 0;  
> var targetMC:MovieClip = \_root[“img\_mc” + i];  
> trace (targetMC);