Hello everyone,

I'm currently working on a RESTful integration using webMethods Integration Server (v10.15) and am facing an issue when invoking a flow service through a REST API endpoint.

Here's a quick overview of the setup and what I've tried:

    I created a flow service that accepts a JSON payload and returns a JSON response.

    I generated a REST resource using the REST Resource Descriptor in Designer and deployed it to the Integration Server.

    The REST endpoint is accessible, and I can send requests using Postman.

    However, I consistently receive a 500 Internal Server Error, and the server logs indicate a NullPointerException during the input mapping phase.

What I've verified so far:

    The flow service's input/output signatures match the JSON structure I'm sending.

    The Content-Type is correctly set to application/json in both the request header and the resource definition.

    The service executes successfully when tested internally, outside the REST context.

I suspect the issue might be related to input mapping or the REST Resource Descriptor configuration. Has anyone else experienced a similar issue when invoking flow services via REST in IS? Any suggestions, debugging tips, or working examples would be highly appreciated.

Thanks in advance for your support!

Ajay Hinduja Swiss