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The most likely cause of any connection issues are when users are not:

  • using Python 3

  • using the most up to date version of the CDS API

So before trying anything else check these two things.

Timeout Error


If you're seeing something a message like this:still having problems check out the most frequency causes below




If you are still experiencing connection issues 


Timeout Errors


If you're error message mentions 'timed out' like the example below.

WARNING Recovering from connection error [HTTPSConnectionPool(host='cds.climate.copernicus.eu', port=443):
Max retries exceeded with url: /api/v2/tasks/7b4e735b-5a79-4913-bbcb-cebc0c65b420 (Caused by ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x7f81056e8940>, 'Connection to cds.climate.copernicus.eu timed out. (connect timeout=60)'))], attempts 12 of 500