# Updated dash, getting an error **URL:** \ **Category:** Dash Python\ **Created:** [February 13, 2019, 4:25pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537 "2019-02-13T16:25:32Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Millow](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Millow](https://community.plotly.com/u/Millow)\ **Post date:** [February 13, 2019, 4:25pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537/1 "2019-02-13T16:25:33Z")
Hello, So after updating dash-core-components & dash, I can’t start my app. Dash says it can’t find plotly-1.42.2.min.js. I know dash-core-components are now using 1.44.3, but how can I tell Dash to use the new one. Sorry if I’m not clear, I’m really not used to updating packages, first time I break a dependency. Thank you Edit: Managed to get it working by downgrading to 0.36 version of dash-core-components that uses 1.42.2. Still don’t know why the new one does not work. ---
**Author:** ![chriddyp](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/chriddyp/32/16855_2.png) [@chriddyp](https://community.plotly.com/u/chriddyp)\ **Post date:** [February 13, 2019, 5:03pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537/2 "2019-02-13T17:03:30Z")
Hm, that’s odd. Could you share a small, reproducable example? ---
**Author:** ![Millow](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Millow](https://community.plotly.com/u/Millow)\ **Post date:** [February 13, 2019, 5:23pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537/3 "2019-02-13T17:23:55Z")
Sure thing, thx for the reply, from the man itself 😀 I’ve reupgraded to 0.43.1 for the test. Here’s the error message I get: [2019-02-13 12:22:04,415] ERROR in app: Exception on /favicon.ico [GET] Traceback (most recent call last): File “C:\ProgramData\Anaconda3\lib\site-packages\flask\app.py”, line 1982, in wsgi\_app reraise(TypeError, new\_error, sys.exc\_info()[2]) File “C:\ProgramData\Anaconda3\lib\site-packages\flask\app.py”, line 1607, in full\_dispatch\_request “”"Return a registered error handler for an exception in this order: File “C:\ProgramData\Anaconda3\lib\site-packages\flask\app.py”, line 1654, in try\_trigger\_before\_first\_request\_functions exception is not called and it shows up as regular exception in the File “C:\ProgramData\Anaconda3\lib\site-packages\dash\dash.py”, line 945, in \_setup\_server args = [] File “C:\ProgramData\Anaconda3\lib\site-packages\dash\dash.py”, line 388, in \_generate\_scripts\_html for resource in resources: File “C:\ProgramData\Anaconda3\lib\site-packages\dash\dash.py”, line 336, in \_collect\_and\_register\_resources } File “C:\ProgramData\Anaconda3\lib\site-packages\dash\dash.py”, line 322, in \_relative\_url\_path def serve\_layout(self): FileNotFoundError: [WinError 2] Le fichier spécifié est introuvable: ‘C:\ProgramData\Anaconda3\lib\site-packages\dash\_core\_components\plotly-1.42.2.min.js’ 127.0.0.1 - - [13/Feb/2019 12:22:04] “GET /favicon.ico HTTP/1.1” 500 - **And as for the code, I used your first tutorial for the example:** ``` import dash import dash_table import pandas as pd df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/solar.csv') app = dash.Dash( __name__ ) app.layout = dash_table.DataTable( id='table', columns=[{"name": i, "id": i} for i in df.columns], data=df.to_dict("rows"), ) if __name__ == ' __main__': app.run_server(debug=False) ``` ---
**Author:** ![Philippe](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/philippe/32/3521_2.png) [@Philippe](https://community.plotly.com/u/Philippe)\ **Post date:** [February 13, 2019, 5:42pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537/4 "2019-02-13T17:42:18Z")
Can you show us `pip freeze` or `conda list` if using conda ? ---
**Author:** ![Millow](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Millow](https://community.plotly.com/u/Millow)\ **Post date:** [February 13, 2019, 7:17pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537/5 "2019-02-13T19:17:47Z")
I have a boat load of packages in my root env, but here’s a list: - List item dash-core-components 0.43.1 dash 0.37.0 dash-renderer 0.18.0 dash-table 3.4.0 dash-table-experiments 0.6.0 flask 0.12 plotly 3.6.1 Otherwise I can get the whole list and paste it, let me know, thank you ---
**Author:** ![Philippe](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/philippe/32/3521_2.png) [@Philippe](https://community.plotly.com/u/Philippe)\ **Post date:** [February 13, 2019, 7:25pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537/6 "2019-02-13T19:25:18Z")
The version you listed all works, I do not get the error. I’d recommend starting with a fresh environment and installing only `dash==0.37.0`. ---
**Author:** ![Millow](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Millow](https://community.plotly.com/u/Millow)\ **Post date:** [February 13, 2019, 7:40pm UTC](https://community.plotly.com/t/updated-dash-getting-an-error/19537/7 "2019-02-13T19:40:55Z")
Roger that. That’s what I did and it works now, good old “start from scratch” solution, but it worked, thank you for the follow up.