PS0010: Plug-In or Configuration File Not Found


Severity	Error
Reported by	PostSharp
Message	`Cannot find the plug-in assembly or configuration file "<FileName>".`

Cause

A Using element of a configuration file, such as postsharp.config, imports another configuration file or a plug-in into the project. See Configuration File Schema Reference. PostSharp reports PS0010, and stops building the project, when it cannot find the file that the File attribute names:

When the name has no path, PostSharp searches the file in the directories of its search path, which include the plug-in directories, the directories of the references of the project, and the directories of the SearchPath elements and of the PostSharpSearchPath MSBuild property. <FileName> is the name as the File attribute gives it.
When the name has a relative or an absolute path, PostSharp looks only at this path, relative to the directory of the configuration file, and <FileName> is the full path that it tried.

PostSharp also reports PS0010 when a plug-in or a configuration file that the build passes to PostSharp does not exist.

In the following example, postsharp.config imports LoggingProfile.config, but the file in its directory is LoggingProfiles.config.

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<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.postsharp.org/1.0/configuration">
  <!-- The file name is misspelled: the file is LoggingProfiles.config. -->
  <Using File="LoggingProfile.config" />
</Project>

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using System;
using PostSharp.Aspects;
using PostSharp.Serialization;

namespace Errors.PS0010_Error;

[PSerializable]
public class LogAttribute : OnMethodBoundaryAspect
{
    public override void OnEntry( MethodExecutionArgs args )
    {
        Console.WriteLine( $"Entering {args.Method.Name}." );
    }
}

public class OrderService
{
    [Log]
    public void PlaceOrder( string product )
    {
        Console.WriteLine( $"Order placed for {product}." );
    }
}

public static class Program
{
    public static void Main()
    {
        new OrderService().PlaceOrder( "Coffee" );
    }
}

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error PS0010: postsharp.config(4,4): Cannot find the plug-in assembly or configuration file "LoggingProfile.config".

Resolution

Check the spelling of the file name, and that the file is where the full path in the message says.
To import a configuration file of your source tree, give its path relative to the configuration file that contains the Using element, for example .\LoggingProfiles.config or ..\Shared\LoggingProfiles.config, so that PostSharp does not depend on the search path to find it.
To import a plug-in by its name, add its directory to the search path with a SearchPath element or with the PostSharpSearchPath MSBuild property. See Well-Known MSBuild Properties.
When the file was removed on purpose, remove the Using element, or give it a Condition.

In the following example, the Using element gives the correct name of the file, with a path relative to postsharp.config, and the project builds.

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<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.postsharp.org/1.0/configuration">
  <!-- The file name is correct, and the path is relative to the directory of this file. -->
  <Using File=".\LoggingProfiles.config" />
</Project>

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using System;
using PostSharp.Aspects;
using PostSharp.Serialization;

namespace Errors.PS0010_Fixed;

[PSerializable]
public class LogAttribute : OnMethodBoundaryAspect
{
    public override void OnEntry( MethodExecutionArgs args )
    {
        Console.WriteLine( $"Entering {args.Method.Name}." );
    }
}

public class OrderService
{
    [Log]
    public void PlaceOrder( string product )
    {
        Console.WriteLine( $"Order placed for {product}." );
    }
}

public static class Program
{
    public static void Main()
    {
        new OrderService().PlaceOrder( "Coffee" );
    }
}

Full screen

Entering PlaceOrder.
Order placed for Coffee.

Cause

Resolution

See Also