Metadata for page xx that is published as a web service is not valid for OData

foo_bar

Hi all,

I am trying to publish a page i've created with sourcetable sales lines.
I have added fields document type and no. to this page.
But when I open the metadata page from the odata url, this endpoint is not visible, and in the event view i get following error

Metadata for page xx that is published as a web service is not valid for OData

I also get this error when publishing standard sales quote/order subform.

Other pages that I have published as a webservice are working fine (purchase order lines, ..).

Does anybody know how I can retrieve the exact problem that is causing the metadata error?

kind regards,

Lorenzo