# Extra instances of MC? What is going on?

**URL:** <https://forum.kirupa.com/t/extra-instances-of-mc-what-is-going-on/38873>\
**Category:** flash\
**Created:** [December 31, 2003, 12:33am UTC](https://forum.kirupa.com/t/extra-instances-of-mc-what-is-going-on/38873 "2003-12-31T00:33:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lowprofile](https://avatars.discourse-cdn.com/v4/letter/l/779978/32.png) [@lowprofile](https://forum.kirupa.com/u/lowprofile)\
**Post date:** [December 31, 2003, 12:33am UTC](https://forum.kirupa.com/t/extra-instances-of-mc-what-is-going-on/38873/1 "2003-12-31T00:33:09Z")

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Hi,  
I have a several MC (movie clips)  
In the root time line, each frame has one of these MC.

The MC plays, then at the end of it it calls:  
nextFrame();  
And thus the root advances one, and plays the next MC.

I just added the ability to move back. prevFrame();

The problem is - now there are two MC’s when you move forward???

What i mean is there is a function in each MC that can be called. When it is called, if this is the second time you have entered that root frame, the function actually calls itself twice.

Enter a third time, and the functions, when called once, execute three times.

This tells me that… somehow you are getting a new function created each time that MC frame is entered, and it is staying.

For example I did a trace on ‘this’, and received this.

Called function once, first time in MC:

this \_level0.slide2  
frame 10

(the above is correct, the function was executed once)

- now from the root, I have moved back, then forward again into the MC’s frame. And when the function is called, it executes twice as seen below:

called once, executes twice:  
this \_level0.slide2  
frame 11  
this \_level0.slide2  
frame 33

called once, executed twice:  
this \_level0.slide2  
frame 127  
this \_level0.slide2  
frame 222