Hi guys, getting the following error and not sure why: A nonexistent object was used in an Output of a Dash callback. The id of this object is sidebar_container and the property is `children. Currently building a multipage app with 4 pages. The last page, contains a callback that contains 'sideba…

Hi @nickmuchi This is a good topic, and thanks for finding that detailed discussion - There’s a good summary in this post: 📣 Dash v1.11.0 Release - Introducing Pattern-Matching Callbacks - #25 by alexcjohnson , and it’s worth repeating this point here: If any Input items are present (or the mult…

Bit more investigation shows the error always happens when returning the jobsite_dropdown_html: Callback that refreshes the site when a data update is trigger @callback( Output(“jobsite_dropdown_container”, “children”), Output(“last_data_refresh_container”, “children”), Output(“data_updated_fla…

Did you ever get a solution for this? I’m facing a the exact same problem SO Post community.plotly.com/ Post

No I still get the error message but everything works fine. I presume it’s a bug in plotlys multi-page app functionality

You get an error but it still functions as intended? Mine doesn’t at all ;(

Anyone else solved this? getting the same error yet I defined the dropdown in the pages layout?

Are you using similar pattern matching callbacks on the other pages?

In my app.py I have a datepicker, button and dcc.Store, in the page_1 I have a dropdown and a callback which takes the button nclicks and datepicker from app.py as inputs to update the dropdown in the page_1 as an output. The dropdown is what is raising the error. I noticed that if I run the app wit…

Do you have supress_callback_exceptions=True when you declare Dash?

Yes I do, so that prevents the error on initial load but once I click the button and select a date in the datepicker the error pops up again.

Can you share how you are declaring the button and the date picker?

A nonexistent object was used in an `Output` of a Dash callback.?

Dash Python

danielbellsa May 25, 2022, 2:19pm 3

Did you ever get a solution for this? I’m facing a the exact same problem

SO Post
community.plotly.com/ Post

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A nonexistent object was used in an `Output` of a Dash callback.?

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