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OzBassist
OzBassist
Inspiring
September 22, 2021
Answered

TypeError: Cannot read properties of null (reading 'id')

  • September 22, 2021
  • 1 reply
  • 14289 views

This error only appears when viewing one slide.

It's not a particularly complex slide, and is very similar to other slides in my project.

Here's the complete error:
TypeError: Cannot read properties of null (reading 'id')
at a.Timeline.setupSlideItemDiv (eval at e (CPXHRLoader.js:37), <anonymous>:1048:11)
at a.Timeline.setupSlideDiv (eval at e (CPXHRLoader.js:37), <anonymous>:1061:445)
at a.Timeline.addFramesetsForSlideAtIndex (eval at e (CPXHRLoader.js:37), <anonymous>:1089:426)
at a.Timeline.loadSlideAtIndex (eval at e (CPXHRLoader.js:37), <anonymous>:1099:509)
at a.Timeline.updateFrame (eval at e (CPXHRLoader.js:37), <anonymous>:1109:82)
at cp.Movie._onEnterFrame (eval at e (CPXHRLoader.js:37), <anonymous>:1240:196)
at step (eval at e (CPXHRLoader.js:37), <anonymous>:1219:23)

 

I have killed and remade the slide with no success.

Same slide error

 

    This topic has been closed for replies.
    Correct answer RodWard

    Take a copy of your project to experiment on, then start removing items from the slide one by one until you find the one that is causing this issue.  If you can successfully remove all items but the issue persists, look at any variables and Advanced Actions or JavaScript code and remove those one by one (line by line if necessary) until the error disappears.

    1 reply

    RodWard
    Community Expert
    RodWardCommunity ExpertCorrect answer
    Community Expert
    September 22, 2021

    Take a copy of your project to experiment on, then start removing items from the slide one by one until you find the one that is causing this issue.  If you can successfully remove all items but the issue persists, look at any variables and Advanced Actions or JavaScript code and remove those one by one (line by line if necessary) until the error disappears.

    OzBassist
    OzBassistAuthor
    Inspiring
    September 22, 2021

    Hey Rod.

    Good to see you're alive and kickin'!
    Apologies, I should have posted a reply earlier, but I found a possible reason.

    Altough I've used transparent PNGs before all over the place, it seems that the 4 I had on this slide may have contributed to the error.

    Steps:

    Remove all the images on the slide : Test : Still broken

    Duplicate the slide and kill the old slide : Test : Still broken

    Duplicate the slide and kill the old slide : Remove all the images : Test : OK

    Duplicate the slide and kill the old slide : Replace the images one by one : Test : OK

    So if you get the 'what's different' .

    Not much, and the logic of a replicated slide didn't fix either.

    I did however reboot Captivate, clear project caches, reboot again.

    But the results aren't consistent enough for me to post that as a fix.

    A bit more like 'jiggle the cable' actually.
    Are you watching the Adobe eLearning show?

    RodWard
    Community Expert
    RodWardCommunity Expert
    Community Expert
    September 22, 2021

    With the PNGs, check whether they are 32 bit PNGs or lower bit depth (e,g, 24 bit).  It could be significant, depending on which app was used to create them.  I only ever use Adobe apps for the image editing so I haven't had issues with PNGs but your mileage may differ.

     

    I wasn't able to watch last night's program with the Adobe show but I may be able to watch the one tonight as long is it finishes before the hour when I turn into a pumpkin.  I'd love to get a look at the next Captivate app they are developing.

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