Triggering same modal from different callbacks

Dash Python
1

I have many callback functions that are supposed to generate a figure. However, sometimes they fail, so I included a try-except mechanism to catch the error and show it to the user as Modal, something like this

@callback(
    [Output("fig", "figure"),
     Output("error-message", "children"),
     Output("error-modal", "is_open")],
     Input("submit", "n_clicks"),
     State("locations-list", "data"))
)
def generate_figure(n_clicks):
    if n_clicks is None:
        return make_empty_figure(), None, False
    try:
        data = get_data()
        return make_figure(data), None, False
    except Exception as e:
        return make_empty_figure(), repr(e), True

This works only with 1 function.
As soon as I try to use the same mechanism with different functions I get the error Output 2 (error-modal.is_open) is already in use., probably because the same Output is used in multiple callbacks.

I think this is happening when the application is loading.
As I don’t want to update the Modal at this time I tried using no_update in place of None and False without luck. I also tried to prevent the initial call of all these callbacks, adding the allow_duplicate option but I still get this error.

So, how can I trigger the same modal from different callback functions without having this error?

2

Ok, apparently after trying again and putting a prevent_initial_call=True and allow_duplicate=True in all callbacks that use this Output BESIDES the first one it seems to work now.
Don’t know what I was doing wrong before