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Examples not working. CLR20r3 error. Is their source available?

Apr 21, 2011 at 10:08 PM

First of all, I wanted to know if the sources were available for any of these (potentially useful) application examples, maybe then I can get them to... not crash.

I downloaded the sample applications (DiskClone.exe, DiskDump.exe, etc) and when i try using "any" of them they always crash.

The dreaded CLR20r3 error


Ran command prompt as administrator (I should mention I am on Server 2k8R2.x64 but even under win7 its the same error.

c:\CMD\DiscUtils>ntfsdump d: h:
NTFSDump v0.9.0, available from
Copyright (c) Kenneth Bell, 2008-2010
Free software issued under the MIT License, see LICENSE.TXT for details.

Unhandled Exception: System.UriFormatException: Invalid URI: The format of the U
RI could not be determined.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at DiscUtils.VirtualDisk.PathToUri(String path)
   at DiscUtils.VirtualDisk.OpenDisk(String path, FileAccess access, String user
, String password)
   at NTFSDump.Program.DoRun()
   at NTFSDump.Program.Main(String[] args)


After this, I get a Windows dump error popup with the CLR20r3 error


Problem signature:
  Problem Event Name:    CLR20r3
  Problem Signature 01:    ntfsdump.exe
  Problem Signature 02:
  Problem Signature 03:    4c5408b5
  Problem Signature 04:    System
  Problem Signature 05:
  Problem Signature 06:    4ba1dff4
  Problem Signature 07:    17dc
  Problem Signature 08:    72
  Problem Signature 09:    System.UriFormatException
  OS Version:    6.1.7601.
  Locale ID:    1033
  Additional Information 1:    eb32
  Additional Information 2:    eb32168d79b689da965ef22b8a3ed23b
  Additional Information 3:    7a08
  Additional Information 4:    7a0846b0e478361d62b2c670bdc3d14b

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Apr 21, 2011 at 10:45 PM

Just FYI,   The same error happens in Win7.x64

It appears I am formatting the parameters incorrectly, but without anything to go by, i don't know the correct format.

Any help would be great. Thanks.

Apr 22, 2011 at 8:30 AM


The utilities are intended to illustrate how to use the DiscUtils library, so are a bit rough-and-ready when it comes to error handling. The confusing thing is probably that the utilities (for the most part) are intended to work on disk images, rather than disks themselves. So, something like this should work:

c:\CMD\DiscUtils>ntfsdump c:\diskimages\mydisk.vhd

The DiskClone utility will take a copy of a drive, for example:

c:\CMD\DiscUtils>diskclone d:\copy-of-c-drive.vhd c: -of VHD-dynamic



Apr 22, 2011 at 9:17 PM

Hi Ken,
   Thanks for the response,  I'll give it a try.  I am curious if the source code for some of these tools is available.  It would greatly speed up my grasp of utilizing some of the techniques the libraries contain without having to spend a lot of time in a learning curve.  Thanks.

Apr 23, 2011 at 10:00 AM


You should find all the source code for discutils, and the utilities in the source download:

Alternatively, you can download the latest changes from here:

The source for the utilities is in the 'utils' folder.




Apr 25, 2011 at 5:15 PM

I managed to get the diskclone utility working.  After looking at the source, I see it uses VSS.  Oddly, it is trying to use VSSAPI.DLL, and when I run it i get a VSS error now instead of the parameter one.   ::shrugs::


at least i got the source though, I can play from here.  Thanks.