microsoft/semantic-kernel · error · NotSupportedException

AI service '{config.Rag.AIEmbeddingService}' is not supporte

Error message

AI service '{config.Rag.AIEmbeddingService}' is not supported.

What it means

Error "AI service '{config.Rag.AIEmbeddingService}' is not supported." thrown in microsoft/semantic-kernel.

Source

Thrown at dotnet/samples/Demos/AgentFrameworkWithAspire/ChatWithAgent.AppHost/Extensions/ResourceBuilderExtensions.cs:67

        builder.WithEnvironment($"{nameof(config.Rag)}__{nameof(config.Rag.CollectionName)}", config.Rag.CollectionName);

        switch (config.Rag.AIEmbeddingService)
        {
            case AzureOpenAIEmbeddingsConfig.ConfigSectionName:
            {
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.AzureOpenAIEmbeddings)}__{nameof(config.AzureOpenAIEmbeddings.DeploymentName)}", config.AzureOpenAIEmbeddings.DeploymentName);
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.AzureOpenAIEmbeddings)}__{nameof(config.AzureOpenAIEmbeddings.ModelName)}", config.AzureOpenAIEmbeddings.ModelName);
                break;
            }

            case OpenAIEmbeddingsConfig.ConfigSectionName:
            {
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.OpenAIEmbeddings)}__{nameof(config.OpenAIEmbeddings.ModelName)}", config.OpenAIEmbeddings.ModelName);
                break;
            }

            default:
                throw new NotSupportedException($"AI service '{config.Rag.AIEmbeddingService}' is not supported.");
        }

        return builder;
    }

    /// <summary>
    /// Adds connection strings of source resources to a destination resource.
    /// </summary>
    /// <typeparam name="T">The type of the destination resource.</typeparam>
    /// <param name="builder">The destination resource.</param>
    /// <param name="resources">The source resource with the connection string.</param>
    /// <returns>The updated resource builder.</returns>
    public static IResourceBuilder<T> WithReferences<T>(this IResourceBuilder<T> builder, IList<IResourceBuilder<IResourceWithConnectionString>> resources) where T : IResourceWithEnvironment
    {
        ArgumentNullException.ThrowIfNull(builder);
        ArgumentNullException.ThrowIfNull(resources);

        foreach (var resource in resources)

View on GitHub (pinned to c028a0c7dc)

Solutions

1. Configure Rag:AIEmbeddingService with a supported embedding service name.
2. Check the supported values in ResourceBuilderExtensions.cs and fix the configuration entry.

When it happens

Trigger: Thrown at dotnet/samples/Demos/AgentFrameworkWithAspire/ChatWithAgent.AppHost/Extensions/ResourceBuilderExtensions.cs:67 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microsoft/semantic-kernel@c028a0c7dc (2026-08-13). Data as JSON: /api/errors/d64770af6b275f3a. Report an issue: GitHub.