---
### Author:  [@Makataui](https://discourse.psychopy.org/u/Makataui)
#### Post date: [March 11, 2019, 9:50am UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/5 "2019-03-11T09:50:13Z")
My apologies for not finding that other issue already - I shall follow that thread.
As per my second one, I got that error when ‘height’ or ‘pixels’ or anything else was selected. Maybe the cache of my experiment didn’t update when I swapped from experiment settings (I had a successful sync after changing that in the builder and a successful sync each time I changed the units of measurement). Would be happy to try again - maybe I should try with a new repo once changed?
Ferenc
---
### Author:  [@dvbridges](https://discourse.psychopy.org/u/dvbridges)
#### Post date: [March 11, 2019, 9:57am UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/6 "2019-03-11T09:57:37Z")
Ok, try forcing a refresh of your browser running the experiment. On a Mac, it is `Cmd-Shift-R`.
---
### Author:  [@Makataui](https://discourse.psychopy.org/u/Makataui)
#### Post date: [March 13, 2019, 2:52pm UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/7 "2019-03-13T14:52:51Z")
Hey @dvbridges - tried a force refresh in a range of browsers (actual and emulated in a browser stack as well for kicks), still getting the same error.
For the MP4 test repo, I’d like to add that the XML file recognises that it should be ‘height’ - when I change and resync, the XML file does update the parameter from what I can tell:
```auto
```
I get that we’re throwing an error here:
```auto
function to_unit(pos, posUnit, win, targetUnit)
{
let errorPrefix = '{ "origin" : "util.to_unit", "context" : "when converting a position to a different unit", "error" : ';
try {
if (targetUnit === 'pix')
return to_px(pos, posUnit, win);
if (targetUnit === 'norm')
return to_norm(pos, posUnit, win);
if (targetUnit === 'height')
return to_height(pos, posUnit, win);
throw errorPrefix + '"unknown target units: ' + targetUnit + '" }';
} catch (error) {
throw errorPrefix + error + '}';
}
}
```
But not entirely sure why - targetUnit should be set to ‘height’ (or pix or whatever) so should be the same type and contain the same value, returning true.
I’ve also cleared cache and cookies and tried different browsers by the way. It only seems to be a problem when trying to get the size of the movie basically.
We also get the following logged to the console:
```auto
WARN unknown | setting the value of attribute: size in PsychObject: movie as: undefined
BrowserConsoleAppender.append @ log4javascript.min.js:148
```
---
### Author:  [@apitiot](https://discourse.psychopy.org/u/apitiot)
#### Post date: [March 22, 2019, 3:42pm UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/8 "2019-03-22T15:42:02Z")
Good afternoon,
I can confirm that the issue has to do with the units of MovieStim being set to “from exp settings” rather than “height”.
@dvbridges: This is something we should take care of at code generation time.
@Makataui: I took the liberty of changing the units in Movie\_Mp4.js, and making a small correction (missing namespace), and your experiment now seems to be running fine at: [https://pavlovia.org/run/Makataui/video-test/html/](https://pavlovia.org/run/Makataui/video-test/html/)
Let me know what you think!
Best wishes,
Alain
---
### Author:  [@Makataui](https://discourse.psychopy.org/u/Makataui)
#### Post date: [March 22, 2019, 4:05pm UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/9 "2019-03-22T16:05:16Z")
@apitiot Cool, I’ll apply the fix you did in the js file to the actual experiment files now so thank you.
Is the missing namespace an issue of generation of the js code or is it something that I’ve missed when setting it up and syncing? I’ll manually add it in now for the other experiment but just wondering if it’s something I’ve done wrong on my end then?
Ferenc
---
### Author:  [@apitiot](https://discourse.psychopy.org/u/apitiot)
#### Post date: [March 26, 2019, 6:34am UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/10 "2019-03-26T06:34:45Z")
The missing namespace is indeed something to do with code generation. David should have it fixed shortly.
---
### Author:  [@dvbridges](https://discourse.psychopy.org/u/dvbridges)
#### Post date: [March 26, 2019, 9:40am UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/11 "2019-03-26T09:40:39Z")
All done, please see pull request below:
>
>
> Previously, movie units were set to 'undefined' if screen units set to
> "from ex…p settings". Now, "from exp settings" is replaced with
> "height" units. Also fixes a missing namespace from movie status.
---
### Author:  [@Tin\_Tin](https://discourse.psychopy.org/u/Tin_Tin)
#### Post date: [February 16, 2022, 1:57am UTC](https://discourse.psychopy.org/t/psychopy-pavlovia-movie-playing-error/6986/12 "2022-02-16T01:57:33Z")
@dvbridges sir, I was also wondering if you could help me. I am quite new to Psychopy - not very familiar with coding. I have managed to make my experiment run locally but encounter problems online - it has to do with my video.
I hope you could help me.