"A Javascript Error Occurred" with no additional explanation

[defaultk6tvbmok2amn]

Hi!

I'm working on a project for school that involves some simple animation and basic scripting on a HTML 5 canvas. My issue is that when I go to test the animation, I get a "A javascript error occured" message, and I'm at a loss as to what could be causing it.

I have some scripting in actions, but even if I completley delete this scripting, I still get the error message when testing the movie. I saw that there was another post with the same error message a few years back, and their fix was to restart animate, restart the computer and try unchecking "export image assets" under publish settings.

I'm at a loss! 

[Joseph Labrecque]

If you attempt this on a different computer - do you recieve the same error message? It may be this particular installation has issues.

[defaultk6tvbmok2amn]

Yes, I've got another machine with Animate 2022 installed and I get the exact same message unfortunately.

[Joseph Labrecque]

It likely has more to do with the file itself then... one thing to try: File > Convert To... > ActionsScript 3.0 - once that file is created, convert it back to HTML5 Canvas to see whether he conversion fixes any file-based problem. The original file will be preserved. 

[defaultk6tvbmok2amn]

Thanks for your reply, I have converted it to Actionscript 3.0, and back to HTML 5, but I'm still getting the same Javascript error message when testing or trying to publish the animation.

[fortunalight]

Was this ever solved? I am having the same issue. 

[kglad]

@fortunalight 

comment out all your code and insert an initial empty keyframe on your main timeline.  test

[fortunalight]

I am still getting the same error. I cannot preview or publish my document.

[kglad]

save with a name.

then remove half the main timeline frames

test

if that triggers the same error, remove the half of the main timeline.

test

results?

[Andrea26785605icfa]

Same error here....i've uninstalled and reinstalled animate...make all updates and upgrade..  no solutions found..  unfortunately...no support from adobe...  so I need to remake my symbols... 😞

[kglad]

upload your fla somewhere and post a link

[Sam3742867127ie]

Hello we're encountering this error too.
It's only happening on my colleagues machine with the same files that work on mine.
When she tries to publish or test a HTML/JS output it throws 'A Javascript error occurred.' and hangs.
The process is stuck on '2 of 4: Convert to JSX'
We've been using this set up for years and its the first time we've encountered this.
Was there any update?

[kglad]

no.

if restarting the problematic computer doesn't work, have them reset their preferences.

[Sam3742867127ie]

I can't believe the old 'have you tried restarting' IT response actually worked. Thank you so much!

[kglad]

you're welcome.

[태훈33331910kz51]

체크 해제 하세요~

[andrewg68845258]

Unclicking the 'Optimize image dimensions' from above screenshot fixed the issue for me.

Im building out different sized digital banner ads; always start a new size from a previously sized one (ie starting with a 300x600; change document size to 160x600 and adjust existing assets / timeline). Thought it had something to do with that.