SAP GOS documents cannot be processed using the BDN

What causes this issue?

You want to edit a document that was stored using the generated object
services (GOS).

System Response

Documents that were stored using the generated object services cannot
be edited using the Business Document Navigator.
This usually refers to either attachments or WWW addresses.

How to fix this error?

Call the appropriate application object and edit the document using the
generated object services.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.