Header Property not working properly in HTTP Adapter in SAP CPI

Hello Experts,

I am working on the REST API Integration by using Oauth 2.0 authentication process.

We need to get the "runID" created in before steps by calling another API and I need to append this "runID" into below stated final API call.

Below is the URL;

https://abc-def-dev.dev.azurexyz.net/lines/querybilling/billinglineruns/${header.runID}/queryActivityruns

Just prior to Http Adapter configuration step, I've configured Content Modifier and created a Message header and I am using this property in the above mentioned URL as a {header.runID}.

The moment I execute the URL by appending "runID" manually I am able to retrieve the JSON response properly.

https://abc-def-dev.dev.azurexyz.net/lines/querybilling/billinglineruns/e502ad7e-3853-4b3c-be8a-57ae30908e2a/queryActivityruns

Response:

Proper JSON data

And, If I append the ${header.runID} as a property to retrieve the JSON response dynamically I am getting the null response (No error or exception over here and only response is Null).

Response:

{"value":[]}

Any Inputs will be highly appreciated!!

Thank you,

Best Regards,

Sree