Horizon returns errors with numbers, but as far as I can see, there aren't numbers in the error reference.

The operation couldn’t be completed. (stellarsdk.HorizonRequestError error 11.)

What is error 11?

More importantly, how do you make heads or tails of these errors?

1 Answer 1


11 is an internal error: An unknown error occured.

You can find a list at: https://www.stellar.org/developers/guides/concepts/transactions.html#possible-errors

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