VHD dowload fails with (500) internal sever error

Hi all

I am trying to download VHD's to local disc. I have downloaded 3 of 4 vhd's of varying size >100gb+ but am having issues downloading one. The below works for all but this particular vhd.

If someone can shed some light on why and how to solve this I would be appreciate it.

Thanks

PowerShell syntax and error below.

 $sourceVHD = "//replacedname.blob.core.windows.net/vhds/replacedname.vhd"
 $destinationVHD = "C:\downloads\downloaded.vhd"
 Save-AzureVhd -Source $sourceVHD -LocalFilePath $destinationVHD -NumberOfThreads 5

Errors with

Save-AzureVhd : The remote server returned an error: (500) Internal Server Error.
At line:1 char:1
+ Save-AzureVhd -Source $sourceVHD -LocalFilePath $destinationVHD -NumberOfThreads ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Save-AzureVhd], StorageException
    + FullyQualifiedErrorId : Microsoft.WindowsAzure.Storage.StorageException,Microsoft.WindowsAzure.Commands.ServiceM
   anagement.StorageServices.SaveAzureVhdCommand