[Python.NET] Re: BadImageFormatException or FileNotFoundException- pythonnet and AlphaVSS

[Alex Earl]

Sometimes the file not found error occurs because a dependency of the dll
can not be found.

On Sun, Jul 10, 2022, 20:06 Steven Manross  wrote:

> Howdy all,
>
>
>
> I am somewhat new to pythonnet and .NET programming, and just joined the
> mailing list.  You have my apologies if I am missing something simple.  I
> am aware that BadImageFormatException suggests that I’m trying to open an
> x64 DLL on a 32-bit OS or python installation (or vice versa), but neither
> seem to be the case (that I can tell).  Depending on exactly how I call the
> code, I get a File Not Found or Bad Image Exception.
>
>
>
> The File Not Found is interesting since the files live in the same
> directory as a working DLL (AlphaVSS.Common works - built to run on any
> architecture, AlphaVSS.x64 doesn’t).
>
>
>
> Specifics:
>
> * Python 3.9.13 (tags/v3.9.13:6de2ca5, May 17 2022, 16:36:42) [MSC v.1929
> 64 bit (AMD64)] on win32
>
> * uninstalled Python 3.10 temporarily so I cant get you that detail (sorry)
>
> * And the Windows version clearly states it’s Windows Server 2016 x64
>
>
>
> I’m doing my testing from ipython.
>
>
>
> The code below was tested with Python 3.9 x64 (pythonnet 2.5.2 via wheel
> file) and Python 3.10 x64 (installed pythonnet 3.0.0-dev1 from git master a
> few days ago) on Windows Server 2016 x64 Evaluation patched for current
> .NET Frameworks 2022-06 and both produce an error on the following code.
>
>
>
> AlphaVSS DLLs were generated via powershell/nuget, and I just copied the
> DLLs from my powershellmodules dir to the “clr_dir” below for testing
> (documentation suggests you copy the files to the same directory for use).
> This DLL was created for .NET Framework 4.5 and I’ve installed Framework
> 4.8 and this Cumulative update:
>
>
>
>- 2022-06 Cumulative Update for .NET Framework 4.8 for Windows Server
>2016 for x64 (KB5014630)
>
>
>
> This code is eventually intended to manipulate the Volume Shadow Copy
> Service on Windows.  I am aware that there is limited functionality for
> ShadowCopies from DISKSHADOW and WMI, but wanted to get more functionality
> from this VSS .NET Library (specifically Shadow Copy Sets), and pythonnet
> seemed like a great way to implement this code in my favorite scripting
> language.
>
>
>
> Here is the documentation for the DLLs (version 2.0.0) if anyone wants
> that:
>
> https://alphavss.alphaleonis.com/api/Alphaleonis.Win32.Vss.html
>
>
>
> git source:
>
> https://github.com/alphaleonis/AlphaVSS
>
>
>
> I double checked permissions on the DLLs and I have full control as the
> administrator.  UAC is completely turned off on this machine (if it
> matters).
>
>
>
> Any suggestions would be appreciated.  This is a test system, so I can do
> just about anything to it including rebuilding it from scratch as it was
> built specifically for testing this.  This is a VM on Hyper-V 2016 (I doubt
> that matters).
>
>
>
> Thank you for your time!
>
>
>
> Steven
>
> #   ipython dir output
> In [16]: ! dir "c:\users\administrator\desktop\alphavss"
>
> Volume in drive C has no label.
>
> Volume Serial Number is 8C70-F8A3
>
>
>
> Directory of c:\users\administrator\desktop\alphavss
>
>
>
> 07/09/2022  03:10 AM  .
>
> 07/09/2022  03:10 AM  ..
>
> 12/03/2019  08:37 PM69,632 AlphaVSS.Common.dll
>
> 12/03/2019  08:37 PM21,408 AlphaVSS.Common.pdb
>
> 12/03/2019  08:37 PM   618,522 AlphaVSS.Common.xml
>
> 12/03/2019  08:37 PM   325,120 AlphaVSS.x64.dll
>
> 12/03/2019  08:37 PM   271,872 AlphaVSS.x86.dll
>
> 12/03/2019  08:29 PM   342,392 Ijwhost.dll
>
> 07/09/2022  03:09 AM  runtimes
>
> 07/09/2022  03:10 AM  win-x64
>
> 07/09/2022  03:10 AM  win-x86
>
>
>
> # code
>
> import sys
>
> import clr
>
> import System
>
> # from System import Reflection
>
>
>
> clr_dir = "C:\\Users\\Administrator\\Desktop\\AlphaVSS"
>
> if clr_dir not in sys.path:
>
> sys.path.append(clr_dir)
>
>
>
> # common_vss =
> Reflection.Assembly.LoadFile(f'{clr_dir}\\AlphaVSS.Common.dll')
>
> clr.AddReference("AlphaVSS.Common") #pylint:disable=I1101
>
>
>
> import Alphaleonis.Win32.Vss as alphavss
>
>
>
>
>
> # clr.AddReference("AlphaVSS.x64") #pylint:disable=I1101
>
> vss = alphavss.VssFactoryProvider.Default
>
> # x64_vss = Reflection.Assembly.LoadFile(f'{clr_dir}\\AlphaVSS.x64.dll')
>
> # BadImageFormatException: An attempt was made to load a program with an
> incorrect format. (Exception from HRESULT: 0x8007000B)
>
>
>
> try:
>
> factory = vss.GetVssFactory()
>
> except System.BadImageFormatException as e:
>
> print(f'Bad Image Format: {e}')
>
> except OSError as e:
>
> # FileNotFoundException: Could not load file or assembly
> 'AlphaVSS.x64, Version=2.0.0.0, Culture=neutral,
> PublicKeyToken=959d3993561034e3' or one of its dependencies. The system
> cannot find the file specified.
>
> print(f'File Not Found: {e}')
> ___
> PythonNet mailing 

[Python.NET] Re: BadImageFormatException or FileNotFoundException- pythonnet and AlphaVSS

[Mark Visser]

+1 - in the past I've used https://www.dependencywalker.com/ 
 to figure out the problem. On mac you can 
use otool -L, and on linux you can use ldd.

> On Jul 11, 2022, at 9:38 AM, Alex Earl  wrote:
> 
> Sometimes the file not found error occurs because a dependency of the dll can 
> not be found. 
> 
> On Sun, Jul 10, 2022, 20:06 Steven Manross  > wrote:
> Howdy all,
> 
>  
> 
> I am somewhat new to pythonnet and .NET programming, and just joined the 
> mailing list.  You have my apologies if I am missing something simple.  I am 
> aware that BadImageFormatException suggests that I’m trying to open an x64 
> DLL on a 32-bit OS or python installation (or vice versa), but neither seem 
> to be the case (that I can tell).  Depending on exactly how I call the code, 
> I get a File Not Found or Bad Image Exception.
> 
>  
> 
> The File Not Found is interesting since the files live in the same directory 
> as a working DLL (AlphaVSS.Common works - built to run on any architecture, 
> AlphaVSS.x64 doesn’t).
> 
>  
> 
> Specifics:
> 
> * Python 3.9.13 (tags/v3.9.13:6de2ca5, May 17 2022, 16:36:42) [MSC v.1929 64 
> bit (AMD64)] on win32
> 
> * uninstalled Python 3.10 temporarily so I cant get you that detail (sorry)
> 
> * And the Windows version clearly states it’s Windows Server 2016 x64
> 
>  
> 
> I’m doing my testing from ipython.
> 
>  
> 
> The code below was tested with Python 3.9 x64 (pythonnet 2.5.2 via wheel 
> file) and Python 3.10 x64 (installed pythonnet 3.0.0-dev1 from git master a 
> few days ago) on Windows Server 2016 x64 Evaluation patched for current .NET 
> Frameworks 2022-06 and both produce an error on the following code.
> 
>  
> 
> AlphaVSS DLLs were generated via powershell/nuget, and I just copied the DLLs 
> from my powershellmodules dir to the “clr_dir” below for testing 
> (documentation suggests you copy the files to the same directory for use).  
> This DLL was created for .NET Framework 4.5 and I’ve installed Framework 4.8 
> and this Cumulative update:
> 
>  
> 
> 2022-06 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 for 
> x64 (KB5014630)
>  
> 
> This code is eventually intended to manipulate the Volume Shadow Copy Service 
> on Windows.  I am aware that there is limited functionality for ShadowCopies 
> from DISKSHADOW and WMI, but wanted to get more functionality from this VSS 
> .NET Library (specifically Shadow Copy Sets), and pythonnet seemed like a 
> great way to implement this code in my favorite scripting language.
> 
>  
> 
> Here is the documentation for the DLLs (version 2.0.0) if anyone wants that:
> 
> https://alphavss.alphaleonis.com/api/Alphaleonis.Win32.Vss.html 
> 
>  
> 
> git source:
> 
> https://github.com/alphaleonis/AlphaVSS 
> 
>  
> 
> I double checked permissions on the DLLs and I have full control as the 
> administrator.  UAC is completely turned off on this machine (if it matters).
> 
>  
> 
> Any suggestions would be appreciated.  This is a test system, so I can do 
> just about anything to it including rebuilding it from scratch as it was 
> built specifically for testing this.  This is a VM on Hyper-V 2016 (I doubt 
> that matters).
> 
>  
> 
> Thank you for your time!
> 
>  
> 
> Steven
> 
> #   ipython dir output
> In [16]: ! dir "c:\users\administrator\desktop\alphavss"
> 
> Volume in drive C has no label.
> 
> Volume Serial Number is 8C70-F8A3
> 
>  
> 
> Directory of c:\users\administrator\desktop\alphavss
> 
>  
> 
> 07/09/2022  03:10 AM  .
> 
> 07/09/2022  03:10 AM  ..
> 
> 12/03/2019  08:37 PM69,632 AlphaVSS.Common.dll
> 
> 12/03/2019  08:37 PM21,408 AlphaVSS.Common.pdb
> 
> 12/03/2019  08:37 PM   618,522 AlphaVSS.Common.xml
> 
> 12/03/2019  08:37 PM   325,120 AlphaVSS.x64.dll
> 
> 12/03/2019  08:37 PM   271,872 AlphaVSS.x86.dll
> 
> 12/03/2019  08:29 PM   342,392 Ijwhost.dll
> 
> 07/09/2022  03:09 AM  runtimes
> 
> 07/09/2022  03:10 AM  win-x64
> 
> 07/09/2022  03:10 AM  win-x86
> 
>  
> 
> # code
> 
> import sys
> 
> import clr
> 
> import System
> 
> # from System import Reflection
> 
>  
> 
> clr_dir = "C:\\Users\\Administrator\\Desktop\\AlphaVSS"
> 
> if clr_dir not in sys.path:
> 
> sys.path.append(clr_dir)
> 
>  
> 
> # common_vss = Reflection.Assembly.LoadFile(f'{clr_dir}\\AlphaVSS.Common.dll')
> 
> clr.AddReference("AlphaVSS.Common") #pylint:disable=I1101
> 
>  
> 
> import Alphaleonis.Win32.Vss as alphavss
> 
>  
> 
>  
> 
> # clr.AddReference("AlphaVSS.x64") #pylint:disable=I1101
> 
> vss = alphavss.VssFactoryProvider.Default
> 
> # x64_vss = Reflection.Assembly.LoadFile(f'{clr_dir}\\AlphaVSS.x64.dll')
> 
> # BadImageFormatException: An attempt was made to load a program with an 
> incorrect format. (Exception from HRESULT: 0x

[Python.NET] Re: BadImageFormatException or FileNotFoundException- pythonnet and AlphaVSS

[Steven Manross]

Thanks for that: Dependency walker was what I needed to see why it was having 
issues.

This DLL depends on the .NET Core and Visual C++ Redist (both are installed but 
it still cant see particular files like: 
API-MS-WIN-CORE-PROCESSTHREADS-L1-1-3.DLL).  Searching for this and other files 
it is missing, revealed that they are not present on the Server.  From what 
I’ve googled, there could be an issue with the dll linking to files that were 
moved to other libraries in current OSes.

Thank you for your help.

Steven
From: Mark Visser 
Sent: Monday, July 11, 2022 8:02 AM
To: A list for users and developers of Python.NET 
Subject: [Python.NET] Re: BadImageFormatException or FileNotFoundException- 
pythonnet and AlphaVSS

+1 - in the past I've used https://www.dependencywalker.com/ to figure out the 
problem. On mac you can use otool -L, and on linux you can use ldd.


On Jul 11, 2022, at 9:38 AM, Alex Earl 
mailto:slide.o@gmail.com>> wrote:

Sometimes the file not found error occurs because a dependency of the dll can 
not be found.

On Sun, Jul 10, 2022, 20:06 Steven Manross 
mailto:ste...@manross.net>> wrote:
Howdy all,

I am somewhat new to pythonnet and .NET programming, and just joined the 
mailing list.  You have my apologies if I am missing something simple.  I am 
aware that BadImageFormatException suggests that I’m trying to open an x64 DLL 
on a 32-bit OS or python installation (or vice versa), but neither seem to be 
the case (that I can tell).  Depending on exactly how I call the code, I get a 
File Not Found or Bad Image Exception.

The File Not Found is interesting since the files live in the same directory as 
a working DLL (AlphaVSS.Common works - built to run on any architecture, 
AlphaVSS.x64 doesn’t).

Specifics:
* Python 3.9.13 (tags/v3.9.13:6de2ca5, May 17 2022, 16:36:42) [MSC v.1929 64 
bit (AMD64)] on win32
* uninstalled Python 3.10 temporarily so I cant get you that detail (sorry)
* And the Windows version clearly states it’s Windows Server 2016 x64

I’m doing my testing from ipython.

The code below was tested with Python 3.9 x64 (pythonnet 2.5.2 via wheel file) 
and Python 3.10 x64 (installed pythonnet 3.0.0-dev1 from git master a few days 
ago) on Windows Server 2016 x64 Evaluation patched for current .NET Frameworks 
2022-06 and both produce an error on the following code.

AlphaVSS DLLs were generated via powershell/nuget, and I just copied the DLLs 
from my powershellmodules dir to the “clr_dir” below for testing (documentation 
suggests you copy the files to the same directory for use).  This DLL was 
created for .NET Framework 4.5 and I’ve installed Framework 4.8 and this 
Cumulative update:


  *   2022-06 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 
for x64 (KB5014630)

This code is eventually intended to manipulate the Volume Shadow Copy Service 
on Windows.  I am aware that there is limited functionality for ShadowCopies 
from DISKSHADOW and WMI, but wanted to get more functionality from this VSS 
.NET Library (specifically Shadow Copy Sets), and pythonnet seemed like a great 
way to implement this code in my favorite scripting language.

Here is the documentation for the DLLs (version 2.0.0) if anyone wants that:
https://alphavss.alphaleonis.com/api/Alphaleonis.Win32.Vss.html

git source:
https://github.com/alphaleonis/AlphaVSS

I double checked permissions on the DLLs and I have full control as the 
administrator.  UAC is completely turned off on this machine (if it matters).

Any suggestions would be appreciated.  This is a test system, so I can do just 
about anything to it including rebuilding it from scratch as it was built 
specifically for testing this.  This is a VM on Hyper-V 2016 (I doubt that 
matters).

Thank you for your time!

Steven
#   ipython dir output
In [16]: ! dir "c:\users\administrator\desktop\alphavss"
Volume in drive C has no label.
Volume Serial Number is 8C70-F8A3

Directory of c:\users\administrator\desktop\alphavss

07/09/2022  03:10 AM  .
07/09/2022  03:10 AM  ..
12/03/2019  08:37 PM69,632 AlphaVSS.Common.dll
12/03/2019  08:37 PM21,408 AlphaVSS.Common.pdb
12/03/2019  08:37 PM   618,522 AlphaVSS.Common.xml
12/03/2019  08:37 PM   325,120 AlphaVSS.x64.dll
12/03/2019  08:37 PM   271,872 AlphaVSS.x86.dll
12/03/2019  08:29 PM   342,392 Ijwhost.dll
07/09/2022  03:09 AM  runtimes
07/09/2022  03:10 AM  win-x64
07/09/2022  03:10 AM  win-x86

# code
import sys
import clr
import System
# from System import Reflection

clr_dir = "C:\\Users\\Administrator\\Desktop\\AlphaVSS"
if clr_dir not in sys.path:
sys.path.append(clr_dir)

# common_vss = Reflection.Assembly.LoadFile(f'{clr_dir}\\AlphaVSS.Common.dll')
clr.AddReference("AlphaVSS.Common") #pylint:disable=I1101

import Alphaleonis.Win32.Vss as alphavss


# clr.AddReference("AlphaVSS.x64") #pylint:disable=I1101
vss = alphavss.VssFactoryProvider.Default
# x64_vss

[Python.NET] Re: BadImageFormatException or FileNotFoundException- pythonnet and AlphaVSS

[Denis Akhiyarov]

This one is quite common error, but things might have changed in .net core
since this wiki was written:

https://github.com/pythonnet/pythonnet/wiki/Troubleshooting-on-Windows,-Linux,-and-OSX


On Mon, Jul 11, 2022 at 12:11 PM Steven Manross  wrote:

> Thanks for that: Dependency walker was what I needed to see why it was
> having issues.
>
>
>
> This DLL depends on the .NET Core and Visual C++ Redist (both are
> installed but it still cant see particular files like:
> API-MS-WIN-CORE-PROCESSTHREADS-L1-1-3.DLL).  Searching for this and other
> files it is missing, revealed that they are not present on the Server.
> From what I’ve googled, there could be an issue with the dll linking to
> files that were moved to other libraries in current OSes.
>
>
>
> Thank you for your help.
>
>
>
> Steven
>
> *From:* Mark Visser 
> *Sent:* Monday, July 11, 2022 8:02 AM
> *To:* A list for users and developers of Python.NET 
> *Subject:* [Python.NET] Re: BadImageFormatException or
> FileNotFoundException- pythonnet and AlphaVSS
>
>
>
> +1 - in the past I've used https://www.dependencywalker.com/ to figure
> out the problem. On mac you can use otool -L, and on linux you can use ldd.
>
>
>
> On Jul 11, 2022, at 9:38 AM, Alex Earl  wrote:
>
>
>
> Sometimes the file not found error occurs because a dependency of the dll
> can not be found.
>
>
>
> On Sun, Jul 10, 2022, 20:06 Steven Manross  wrote:
>
> Howdy all,
>
>
>
> I am somewhat new to pythonnet and .NET programming, and just joined the
> mailing list.  You have my apologies if I am missing something simple.  I
> am aware that BadImageFormatException suggests that I’m trying to open an
> x64 DLL on a 32-bit OS or python installation (or vice versa), but neither
> seem to be the case (that I can tell).  Depending on exactly how I call the
> code, I get a File Not Found or Bad Image Exception.
>
>
>
> The File Not Found is interesting since the files live in the same
> directory as a working DLL (AlphaVSS.Common works - built to run on any
> architecture, AlphaVSS.x64 doesn’t).
>
>
>
> Specifics:
>
> * Python 3.9.13 (tags/v3.9.13:6de2ca5, May 17 2022, 16:36:42) [MSC v.1929
> 64 bit (AMD64)] on win32
>
> * uninstalled Python 3.10 temporarily so I cant get you that detail (sorry)
>
> * And the Windows version clearly states it’s Windows Server 2016 x64
>
>
>
> I’m doing my testing from ipython.
>
>
>
> The code below was tested with Python 3.9 x64 (pythonnet 2.5.2 via wheel
> file) and Python 3.10 x64 (installed pythonnet 3.0.0-dev1 from git master a
> few days ago) on Windows Server 2016 x64 Evaluation patched for current
> .NET Frameworks 2022-06 and both produce an error on the following code.
>
>
>
> AlphaVSS DLLs were generated via powershell/nuget, and I just copied the
> DLLs from my powershellmodules dir to the “clr_dir” below for testing
> (documentation suggests you copy the files to the same directory for use).
> This DLL was created for .NET Framework 4.5 and I’ve installed Framework
> 4.8 and this Cumulative update:
>
>
>
>- 2022-06 Cumulative Update for .NET Framework 4.8 for Windows Server
>2016 for x64 (KB5014630)
>
>
>
> This code is eventually intended to manipulate the Volume Shadow Copy
> Service on Windows.  I am aware that there is limited functionality for
> ShadowCopies from DISKSHADOW and WMI, but wanted to get more functionality
> from this VSS .NET Library (specifically Shadow Copy Sets), and pythonnet
> seemed like a great way to implement this code in my favorite scripting
> language.
>
>
>
> Here is the documentation for the DLLs (version 2.0.0) if anyone wants
> that:
>
> https://alphavss.alphaleonis.com/api/Alphaleonis.Win32.Vss.html
>
>
>
> git source:
>
> https://github.com/alphaleonis/AlphaVSS
>
>
>
> I double checked permissions on the DLLs and I have full control as the
> administrator.  UAC is completely turned off on this machine (if it
> matters).
>
>
>
> Any suggestions would be appreciated.  This is a test system, so I can do
> just about anything to it including rebuilding it from scratch as it was
> built specifically for testing this.  This is a VM on Hyper-V 2016 (I doubt
> that matters).
>
>
>
> Thank you for your time!
>
>
>
> Steven
>
> #   ipython dir output
> In [16]: ! dir "c:\users\administrator\desktop\alphavss"
>
> Volume in drive C has no label.
>
> Volume Serial Number is 8C70-F8A3
>
>
>
> Directory of c:\users\administrator\desktop\alphavss
>
>
>
> 07/09/2022  03:10 AM  .
>
> 07/09/2022  03:10 AM  ..
>
> 12/03/2019  08:37 PM69,632 AlphaVSS.Common.dll
>
> 12/03/2019  08:37 PM21,408 AlphaVSS.Common.pdb
>
> 12/03/2019  08:37 PM   618,522 AlphaVSS.Common.xml
>
> 12/03/2019  08:37 PM   325,120 AlphaVSS.x64.dll
>
> 12/03/2019  08:37 PM   271,872 AlphaVSS.x86.dll
>
> 12/03/2019  08:29 PM   342,392 Ijwhost.dll
>
> 07/09/2022  03:09 AM  runtimes
>
> 07/09/2022  03:10 AM  win-x64
>
> 07/09/2022  03:10 AM  

[Python.NET] Re: BadImageFormatException or FileNotFoundException- pythonnet and AlphaVSS

[Steven Manross]

It looks like the problem was created by me in gathering these DLLs the way I 
did.

After building the DLLs from the Git source in VS 2019, I can now correctly 
create the VSSFactory object from my sample script without any dependency 
issues.

Thanks for everyone’s suggestions.

Enjoy the rest of your day!

Steven
From: Denis Akhiyarov 
Sent: Monday, July 11, 2022 10:24 AM
To: A list for users and developers of Python.NET 
Subject: [Python.NET] Re: BadImageFormatException or FileNotFoundException- 
pythonnet and AlphaVSS

This one is quite common error, but things might have changed in .net core 
since this wiki was written:

https://github.com/pythonnet/pythonnet/wiki/Troubleshooting-on-Windows,-Linux,-and-OSX


On Mon, Jul 11, 2022 at 12:11 PM Steven Manross 
mailto:ste...@manross.net>> wrote:
Thanks for that: Dependency walker was what I needed to see why it was having 
issues.

This DLL depends on the .NET Core and Visual C++ Redist (both are installed but 
it still cant see particular files like: 
API-MS-WIN-CORE-PROCESSTHREADS-L1-1-3.DLL).  Searching for this and other files 
it is missing, revealed that they are not present on the Server.  From what 
I’ve googled, there could be an issue with the dll linking to files that were 
moved to other libraries in current OSes.

Thank you for your help.

Steven
From: Mark Visser mailto:ma...@unity3d.com>>
Sent: Monday, July 11, 2022 8:02 AM
To: A list for users and developers of Python.NET 
mailto:pythonnet@python.org>>
Subject: [Python.NET] Re: BadImageFormatException or FileNotFoundException- 
pythonnet and AlphaVSS

+1 - in the past I've used https://www.dependencywalker.com/ to figure out the 
problem. On mac you can use otool -L, and on linux you can use ldd.

On Jul 11, 2022, at 9:38 AM, Alex Earl 
mailto:slide.o@gmail.com>> wrote:

Sometimes the file not found error occurs because a dependency of the dll can 
not be found.

On Sun, Jul 10, 2022, 20:06 Steven Manross 
mailto:ste...@manross.net>> wrote:
Howdy all,

I am somewhat new to pythonnet and .NET programming, and just joined the 
mailing list.  You have my apologies if I am missing something simple.  I am 
aware that BadImageFormatException suggests that I’m trying to open an x64 DLL 
on a 32-bit OS or python installation (or vice versa), but neither seem to be 
the case (that I can tell).  Depending on exactly how I call the code, I get a 
File Not Found or Bad Image Exception.

The File Not Found is interesting since the files live in the same directory as 
a working DLL (AlphaVSS.Common works - built to run on any architecture, 
AlphaVSS.x64 doesn’t).

Specifics:
* Python 3.9.13 (tags/v3.9.13:6de2ca5, May 17 2022, 16:36:42) [MSC v.1929 64 
bit (AMD64)] on win32
* uninstalled Python 3.10 temporarily so I cant get you that detail (sorry)
* And the Windows version clearly states it’s Windows Server 2016 x64

I’m doing my testing from ipython.

The code below was tested with Python 3.9 x64 (pythonnet 2.5.2 via wheel file) 
and Python 3.10 x64 (installed pythonnet 3.0.0-dev1 from git master a few days 
ago) on Windows Server 2016 x64 Evaluation patched for current .NET Frameworks 
2022-06 and both produce an error on the following code.

AlphaVSS DLLs were generated via powershell/nuget, and I just copied the DLLs 
from my powershellmodules dir to the “clr_dir” below for testing (documentation 
suggests you copy the files to the same directory for use).  This DLL was 
created for .NET Framework 4.5 and I’ve installed Framework 4.8 and this 
Cumulative update:


  *   2022-06 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 
for x64 (KB5014630)

This code is eventually intended to manipulate the Volume Shadow Copy Service 
on Windows.  I am aware that there is limited functionality for ShadowCopies 
from DISKSHADOW and WMI, but wanted to get more functionality from this VSS 
.NET Library (specifically Shadow Copy Sets), and pythonnet seemed like a great 
way to implement this code in my favorite scripting language.

Here is the documentation for the DLLs (version 2.0.0) if anyone wants that:
https://alphavss.alphaleonis.com/api/Alphaleonis.Win32.Vss.html

git source:
https://github.com/alphaleonis/AlphaVSS

I double checked permissions on the DLLs and I have full control as the 
administrator.  UAC is completely turned off on this machine (if it matters).

Any suggestions would be appreciated.  This is a test system, so I can do just 
about anything to it including rebuilding it from scratch as it was built 
specifically for testing this.  This is a VM on Hyper-V 2016 (I doubt that 
matters).

Thank you for your time!

Steven
#   ipython dir output
In [16]: ! dir "c:\users\administrator\desktop\alphavss"
Volume in drive C has no label.
Volume Serial Number is 8C70-F8A3

Directory of c:\users\administrator\desktop\alphavss

07/09/2022  03:10 AM  .
07/09/2022  03:10 AM  ..
12/03/2019  08:37 PM69,632 AlphaVSS.Common.dll
12/03/2019  08:37 PM