One of the most common errors we come across while calling API to create records in Dynamics but isn’t clear what it means? One such issue is – “An error occurred while validating input parameters: Microsoft.OData.ODataException: Does not support untyped value in non-open type.”

On the console of the browser, you’ll see this –

But, if you open the <objectName>.responseText of the Failure message of the call, you’ll see the below –

A more zoomed view of the error would be below –

This is because of my typo in the code [Which is the case for most scenarios] where you mistype a name of the field and neither does the error itself doesn’t specify which field you’re missing out on nor what it means!

Reason

This is because of a simple typo  in one of the fields in the object I was creating using AJAX

In my case, this should have been “entity.duration” and not “entity.durationn“.

It was a simple issue which led me wander troubleshooting in areas which I shouldn’t look into.

Hope this saves you some valuable time! Happy 365ing!