The remote server returned an error: (404) Not Found. Microsoft.WindowsAzure.Storage

0 down vote favorite I have had a storage account running for some time at Australia South East. Since late this morning I have been unable to download files from it.

The message is

  Microsoft.WindowsAzure.Storage.StorageException
  HResult=0x80131500
  Message=The remote server returned an error: (404) Not Found.
  Source=Microsoft.WindowsAzure.Storage
  StackTrace:
  at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.ExecuteSync[T] 
  (RESTCommand1 cmd, IRetryPolicy policy, OperationContext operationContext)
  at Microsoft.WindowsAzure.Storage.Blob.CloudBlob.DownloadToStream(Stream 
  target, AccessCondition accessCondition, BlobRequestOptions options, 
  OperationContext operationContext)
  at Microsoft.WindowsAzure.Storage.Blob.CloudBlob.DownloadToFile(String path, 
  FileMode mode, AccessCondition accessCondition, BlobRequestOptions options, 
  OperationContext operationContext)

I was using the old classic storage and I have since moved to ordinary storage accounts.

I could access the files in the classic storage using the portal. The access keys had not changed.

I am wondering what might have caused the old code to stop working.