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The most common cause of any connection issues is from users not:

  • using Python 3
  • using the most up to date version of the CDS API


So before trying anything else we recommend you check these two issues.  If you're still experiencing problems the most frequent issues and fixes are below.


'Timed out'


If you're seeing an error message which 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