Still getting "Model not found" error instead of static figure when saving and re-opening the notebook

[nvaytet]

Hi, unfortunately, I am still seeing this error after re-opening the notebook.

The console log from Chrome:

Versions:

jupyter_client            7.3.1              pyhd8ed1ab_0    conda-forge
jupyter_core              4.10.0           py39hf3d152e_0    conda-forge
jupyter_server            1.17.0             pyhd8ed1ab_0    conda-forge
jupyterlab                3.4.2              pyhd8ed1ab_0    conda-forge
jupyterlab_pygments       0.2.2              pyhd8ed1ab_0    conda-forge
jupyterlab_server         2.14.0             pyhd8ed1ab_0    conda-forge
jupyterlab_widgets        1.1.0              pyhd8ed1ab_0    conda-forge

matplotlib                3.5.2            py39hf3d152e_0    conda-forge
matplotlib-base           3.5.2            py39h700656a_0    conda-forge
matplotlib-inline         0.1.3              pyhd8ed1ab_0    conda-forge

ipydatawidgets            4.3.1.post1        pyhc268e32_0    conda-forge
ipykernel                 6.13.0           py39hef51801_0    conda-forge
ipympl                    0.9.1              pyhd8ed1ab_0    conda-forge
ipython                   8.4.0            py39hf3d152e_0    conda-forge
ipython_genutils          0.2.0                      py_1    conda-forge
ipywidgets                7.7.0              pyhd8ed1ab_0    conda-forge

Thanks for any help!

Originally posted by @nvaytet in https://github.com/matplotlib/ipympl/issues/343#issuecomment-1170066433

[martinRenou]

Mmh I'm wondering if something has changed in JupyterLab recently that causes this. Would you be able to try to downgrade JupyterLab?

[nvaytet]

Which version should I try?

[martinRenou]

Sorry I didn't mean to close this issue 😕 maybe 3.0?

[martinRenou]

Looks like I'm not the only one closing issues unintentionally https://twitter.com/choldgraf/status/1542169522282860550?s=20&t=7WHeO5lmM8dD62HwB5qHsg

[nvaytet]

I am still getting the "Model not found" error in Jupyterlab=3.0.18

272.3fcd6d7045eecfb56da6.js:1 Failed to fetch ipywidgets through the "jupyter.widget.control" comm channel, fallback to fetching individual model state. Reason: Control comm was closed too early
(anonymous) @ 272.3fcd6d7045eecfb56da6.js:1
(anonymous) @ 272.3fcd6d7045eecfb56da6.js:1
(anonymous) @ 272.3fcd6d7045eecfb56da6.js:1
a @ 272.3fcd6d7045eecfb56da6.js:1
Promise.then (async)
l @ 272.3fcd6d7045eecfb56da6.js:1
s @ 272.3fcd6d7045eecfb56da6.js:1
Promise.then (async)
l @ 272.3fcd6d7045eecfb56da6.js:1
(anonymous) @ 272.3fcd6d7045eecfb56da6.js:1
D @ 272.3fcd6d7045eecfb56da6.js:1
e._loadFromKernel @ 272.3fcd6d7045eecfb56da6.js:1
_loadFromKernel @ 523.66fca84c7924f6f7676d.js:1
await in _loadFromKernel (async)
restoreWidgets @ 523.66fca84c7924f6f7676d.js:1
x @ 523.66fca84c7924f6f7676d.js:1
L @ 523.66fca84c7924f6f7676d.js:1
(anonymous) @ 523.66fca84c7924f6f7676d.js:1
m @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
l @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
e.emit @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
(anonymous) @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
m @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
l @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
e.emit @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
add @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
await in add (async)
add @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
add @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
(anonymous) @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
m @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
l @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
e.emit @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
createNew @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
createWidget @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
_createOrOpenDocument @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
open @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
openOrReveal @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
_handleOpen @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
_evtDblClick @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
handleEvent @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
523.66fca84c7924f6f7676d.js:1 Error: widget model not found
    at x.get_model (523.66fca84c7924f6f7676d.js:1:6292)
    at u.renderModel (523.66fca84c7924f6f7676d.js:1:972)
renderModel @ 523.66fca84c7924f6f7676d.js:1
await in renderModel (async)
_rerender @ 523.66fca84c7924f6f7676d.js:1
m @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
l @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
e.emit @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
restoreWidgets @ 523.66fca84c7924f6f7676d.js:1
await in restoreWidgets (async)
x @ 523.66fca84c7924f6f7676d.js:1
L @ 523.66fca84c7924f6f7676d.js:1
(anonymous) @ 523.66fca84c7924f6f7676d.js:1
m @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
l @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
e.emit @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
(anonymous) @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
m @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
l @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
e.emit @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
add @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
await in add (async)
add @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
add @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
(anonymous) @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
m @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
l @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
e.emit @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
createNew @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
createWidget @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
_createOrOpenDocument @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
open @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
openOrReveal @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
_handleOpen @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
_evtDblClick @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2
handleEvent @ jlab_core.8e0f8627d52a54fc21fe.js?v=8e0f8627d52a54fc21fe:2

[nvaytet]

Ah, version 3.0.0 works!

[nvaytet]

Another question: is it at all possible to obtain the same behaviour if the figure is placed inside another (e.g. VBox) widget? Thanks!

[martinRenou]

Ah, version 3.0.0 works!

Interesting! So something has changed between 3.0.0 and 3.0.18 that prevents it from displaying the image repr...

Another question: is it at all possible to obtain the same behaviour if the figure is placed inside another (e.g. VBox) widget?

This might be difficult, if the VBox cannot be displayed then we cannot do much about it. Also the VBox embeds the widget representation of the plot, not the image one.

[nvaytet]

What's interesting is:

• I first run the notebook using 3.0.0, save it, re-open it and I still see the figure.
• then I go back to a higher version of lab (3.0.18 or even 3.4)
• open that same saved notebook, all of a sudden I can see the figure

I am guessing the png repr is correctly being saved by 3.0.0 (I don't know exactly which version broke between 3.0.0 and 3.0.18 yet), and then it can be loaded by later versions.

So this would mean that versions 3.0.18 and higher are failing to save the png rather than load it?

[jklymak]

I can confirm that downgrading (mamba install jupyterlab=3.0.0) also fixes this issue for me.

[davidfokkema]

Can confirm that jupyterlab 3.0.0 does work and that jupyterlab 3.5.2 does not work. Also: the problem seems to be in saving the notebook. A simple notebook saved with 3.0.0 opens with a static image in 3.5.2.

[petrovfedor]

I can confirm @davidfokkema. That 3.0.0 works and 3.5.2 not. Moreover in our case we use widgets with asynchronous calls. And this problem leads to widgets disappearing from the notebook approximately after one minute idle.

[petrovfedor]

Just tested this with 3.5.0 and it works.

[jklymak]

I get "Error displaying widget: model not found" with the following env (and jupyterlab 3.6.1):

$ mamba list jupyterlab
# packages in environment at /Users/jklymak/mambaforge/envs/LP22a:
#
# Name                    Version                   Build  Channel
jupyterlab                3.5.0              pyhd8ed1ab_0    conda-forge
jupyterlab_pygments       0.2.2              pyhd8ed1ab_0    conda-forge
jupyterlab_server         2.19.0             pyhd8ed1ab_0    conda-forge
jupyterlab_widgets        3.0.5              pyhd8ed1ab_0    conda-forge
(LP22a)
# jklymak @ quadra in ~/Dropbox/LP22a [16:05:37]
$ mamba list ipympl
# packages in environment at /Users/jklymak/mambaforge/envs/LP22a:
#
# Name                    Version                   Build  Channel
ipympl                    0.9.3              pyhd8ed1ab_0    conda-forge
(LP22a)

jupyterlab 3.0.0 works though.

[lrlunin]

Not working in the jupyterlab 3.6.4 either.