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##### boost::mqtt5::logger::at_transport_error

Outputs the error message when it occurs at the transport layer read or write operations.

###### Synopsis

    void
    at_transport_error(
        boost::mqtt5::error_code ec);

###### Parameters

Name | Description
--- | ---
`ec` | The error code returned by the `async_read_some` or `async_write_some` operation on the underlying StreamType stream.