Got a similar error:
<Error>
<Code>
NoSuchKey
</Code>
<Message>
The specified key does not exist.
</Message>
<Key>
technotes/ecart_ssl_ht.pdf
</Key>
<RequestId>
BF79A06B7BC6E752
</RequestId>
<HostId>
SrIp+AqjYvOIlls++RfVBhJzBr3PXrEWT4ZVtOzLDA5fFGoBGyX4zqWPpWm/JDZR
</HostId>
</Error>
This was evoked from the above shown link.