Hello! I’m having an issue where a callback I’ve written will only return if I do not include certain variables.

The return statement is like this:

```
return [graphs['charge_current_graph'], graphs['charge_temperature_graph'], graphs['charge_time_graph'],
graphs['height_of_charge_graph'], graphs['charge_99_trend_graph'], graphs['discharge_current_graph'],
graphs['discharge_temperature_graph'], graphs['discharge_time_graph'], graphs['depth_of_discharge_graph'],
graphs['discharge_9_trend_graph'], version_information, fault_counts, fault_history, hours_information, None]
```

The variables in question are `version_information`

, `fault_counts`

, and `fault_history`

. They are all three dictionaries that are returned to dcc.Store components, while all previous values are returned to dcc.Graph figures, and the final two are returned to html.Div children.

If I rewrite the return statement to be this:

```
return [graphs['charge_current_graph'], graphs['charge_temperature_graph'], graphs['charge_time_graph'],
graphs['height_of_charge_graph'], graphs['charge_99_trend_graph'], graphs['discharge_current_graph'],
graphs['discharge_temperature_graph'], graphs['discharge_time_graph'], graphs['depth_of_discharge_graph'],
graphs['discharge_9_trend_graph'], None, None, None, hours_information, None]
```

or even like:

```
return [graphs['charge_current_graph'], graphs['charge_temperature_graph'], graphs['charge_time_graph'],
graphs['height_of_charge_graph'], graphs['charge_99_trend_graph'], graphs['discharge_current_graph'],
graphs['discharge_temperature_graph'], graphs['discharge_time_graph'], graphs['depth_of_discharge_graph'],
graphs['discharge_9_trend_graph'], dict(), dict(), dict(), hours_information, None]
```

The function will return fine. But if I try to return those variables, I get this Error.

I have no idea at all why includeing those dictionaries as variable names would cause this error to suddenly appear. Does anyone know if this is a bug? Please let me know if I need to supply more information.

Thank you!