RuntimeError: Failed to create a .NET runtime (coreclr) using the parameters {}. #2513

dom-compusoft · 2024-11-19T02:09:52Z

dom-compusoft
Nov 19, 2024

I'm running into an issue trying to download the CalcPad Python API, which requires Pythonnet. Specifically, I am encountering an error related to the missing .NET runtime (coreclr) when trying to load the coreclr runtime. Despite having the .NET SDK and Runtime installed, Pythonnet cannot find the required hostfxr library, resulting in the following error:

Traceback (most recent call last):
  File "C:\path\to\project\.conda\Lib\site-packages\pythonnet\__init__.py", line 77, in _create_runtime_from_spec
    return clr_loader.get_coreclr(**params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\path\to\project\.conda\Lib\site-packages\clr_loader\__init__.py", line 142, in get_coreclr
    impl = DotnetCoreRuntime(runtime_config=runtime_config, dotnet_root=dotnet_root)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\path\to\project\.conda\Lib\site-packages\clr_loader\hostfxr.py", line 22, in __init__    
    self._dll = load_hostfxr(self._dotnet_root)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\path\to\project\.conda\Lib\site-packages\clr_loader\ffi\__init__.py", line 37, in load_hostfxr
    raise RuntimeError(f"Could not find a suitable hostfxr library in {dotnet_root}")
RuntimeError: Could not find a suitable hostfxr library in C:\Program Files\dotnet

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "c:\path\to\project\.conda\Lib\site-packages\pycalcpad\PyCalcpadRun.py", line 3, in <module> 
    from PyCalcpadWrapper import Calculator, MathSettings
  File "c:\path\to\project\.conda\Lib\site-packages\pycalcpad\PyCalcpadWrapper.py", line 6, in <module>
    load("coreclr")
  File "C:\path\to\project\.conda\Lib\site-packages\pythonnet\__init__.py", line 135, in load       
    set_runtime(runtime, **params)
  File "C:\path\to\project\.conda\Lib\site-packages\pythonnet\__init__.py", line 29, in set_runtime 
    runtime = _create_runtime_from_spec(runtime, params)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\path\to\project\.conda\Lib\site-packages\pythonnet\__init__.py", line 90, in _create_runtime_from_spec
    raise RuntimeError(
RuntimeError: Failed to create a .NET runtime (coreclr) using the
                parameters {}.

Any help or guidance would be much appreciated :)

pb-413 · 2025-03-12T18:26:57Z

pb-413
Mar 12, 2025

I think I'm running into this, too. Feels like it happened kind of out all of a sudden.

I'm in a build pipeline with just one agent and wondering if something happened to it because, for the same code, I had a run without error in the past but re-running for the same commit is giving the above error.

My versions of dependencies are as follows:

pythonnet: 3.0.3
clr-loader: 0.2.6

How can you verify the installation (and availability?) of the .NET SDK and Runtime? That is what I'm looking into next.

2 replies

pb-413 Mar 12, 2025

When I logged into my VM (agent), I saw a message like so:

1 updates could not be installed automatically. For more details,
see /var/log/unattended-upgrades/unattended-upgrades.log

Reading that file, it seems some dotnet package was automatically uninstalled while another piece (?) was kept:

2025-03-12 06:58:19,735 INFO Starting unattended upgrades script
2025-03-12 06:58:19,736 INFO Allowed origins are: o=Ubuntu,a=jammy, o=Ubuntu,a=jammy-security, o=UbuntuESMApps,a=jammy-apps-security, o=UbuntuESM,a=jammy-infra-security
...
2025-03-12 06:58:24,977 INFO Packages that will be upgraded: aspnetcore-runtime-8.0 aspnetcore-targeting-pack-8.0 dotnet-apphost-pack-8.0 dotnet-runtime-8.0 dotnet-targeting-pack-8.0 python3-jinja2
2025-03-12 06:58:24,977 INFO Writing dpkg log to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
2025-03-12 06:59:39,880 INFO All upgrades installed
2025-03-12 06:59:50,590 INFO Packages that were successfully auto-removed: dotnet-runtime-deps-8.0
2025-03-12 06:59:50,591 INFO Packages that are kept back:
2025-03-12 06:59:50,849 INFO Package dotnet-hostfxr-8.0 is kept back because a related package is kept back or due to local apt_preferences(5).

This mention of hostfxr being kept seems contradictory to our issue, but relevant.

Perhaps the item that was removed, dotnet-runtime-deps-8.0, helps pythonnet find and fulfil this dependency?

/var/log/unattended-upgrades/unattended-upgrades-dpkg.log didn't seem helpful.

I wonder how I could re-install dotnet-runtime-deps-8.0 to test the theory.

pb-413 Mar 12, 2025

dotnet --info reveals that I have no runtime.

$ dotnet --info
You must install or update .NET to run this application.

App: /usr/share/dotnet/sdk/8.0.405/dotnet.dll
...
No frameworks were found.

Learn more:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=8.0.12&arch=x64&rid=linux-x64&os=ubuntu.22.04
...
.NET SDKs installed:
  8.0.405 [/usr/share/dotnet/sdk]

.NET runtimes installed:
  No runtimes were found.

That aligns with the "auto-removed: dotnet-runtime-deps-8.0" line I saw above, but might not align with this thread:

Despite having the .NET SDK and Runtime installed...

For others, my resolution steps (ubuntu):

dotnet --list-runtimes, which initially returned empty
sudo apt-get update, because install didn't seem to work without this first
sudo apt-get install -y dotnet-runtime-8.0
dotnet --list-runtimes, which showed that I got my 8.0 runtime

Source: https://learn.microsoft.com/en-us/dotnet/core/install/linux-ubuntu-install?pivots=os-linux-ubuntu-2204&tabs=dotnet8#install-the-runtime

After executing the above resolution steps, I ran my pipeline and everything was back to normal!

Summary of my experience with resolution steps and troubleshooting:

$ dotnet --list-runtimes # no return
$ sudo apt-get install -y dotnet-runtime-8.0
[sudo] password for user:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
dotnet-runtime-8.0 is already the newest version (8.0.14-0ubuntu1~22.04.1).
dotnet-runtime-8.0 set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 35 not upgraded.
$ dotnet --list-runtimes # no return
$ sudo apt-get update
$ sudo apt-get check # not sure if this is needed; I was just troubleshooting / exploring apt-get
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
$ sudo apt-get install -y dotnet-runtime-8.0
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  liblttng-ust-common1 liblttng-ust-ctl5 liblttng-ust1
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  dotnet-hostfxr-8.0 dotnet-runtime-deps-8.0
The following NEW packages will be installed:
  dotnet-runtime-deps-8.0
The following packages will be upgraded:
  dotnet-hostfxr-8.0 dotnet-runtime-8.0
2 upgraded, 1 newly installed, 0 to remove and 38 not upgraded.
$ dotnet --list-runtimes
Microsoft.NETCore.App 8.0.14 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Strange that it mentions installing dotnet-hostfxr-8.0 even though the other log said that it would be kept around.

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RuntimeError: Failed to create a .NET runtime (coreclr) using the parameters {}. #2513

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RuntimeError: Failed to create a .NET runtime (coreclr) using the parameters {}. #2513

dom-compusoft Nov 19, 2024

Replies: 1 comment · 2 replies

pb-413 Mar 12, 2025

pb-413 Mar 12, 2025

pb-413 Mar 12, 2025

dom-compusoft
Nov 19, 2024

Replies: 1 comment 2 replies

pb-413
Mar 12, 2025