# Error opening external swf

**URL:** <https://forum.kirupa.com/t/error-opening-external-swf/255345>\
**Category:** flash\
**Created:** [March 21, 2008, 1:30pm UTC](https://forum.kirupa.com/t/error-opening-external-swf/255345 "2008-03-21T13:30:31Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Wahnsinn](https://avatars.discourse-cdn.com/v4/letter/w/c89c15/32.png) [@Wahnsinn](https://forum.kirupa.com/u/Wahnsinn)\
**Post date:** [March 21, 2008, 1:30pm UTC](https://forum.kirupa.com/t/error-opening-external-swf/255345/1 "2008-03-21T13:30:31Z")

</div>

Hi,

Got a question, should be pretty simple…

I use this script on a button:

```auto
on (press){
    loadMovie(testfilmpje.swf, this._parent.detaillijn_mc);
}

```

The returning error is:

Error opening URL ‘file:///E|/School/Afstuderen/Prototype/undefined’

The “testfilmpje.swf” is in the Prototype folder.

So, what’s wrong??