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…

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?

sure, snippet of app.py app.layout = html.Div([ sidebar, navbar, dcc.Location(id="url"), dcc.Loading(id='load', type='default', children=[ html.Div([dcc.Store(id='data_memory'), dcc.Store(id='position_data…

Hi @nickmuchi I haven’t encountered that when also adding supress_callback_exceptions=True as suggested by @Croll12 . Do you get the same error when you run the examples ? Can you make a minimal example that reproduces the error?

A snippet of the example: I have 2 pages, app.py and pages_1, app.py has 3 components, a button, date picker and Store. The button and date picker are BOTH used as Inputs of a callback in pages_1. Pages_1 will then use those inputs to run a process which updates a dropdown in pages_1 layout (the …

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

Dash Python

nickmuchi August 22, 2022, 2:19pm 13

@AnnMarieW wondering if you have encountered the above before?

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

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