I have been uploading a detached Revit model to Autodesk 360 to share with our engineering team for the past few months. I detach the model from the central model, detach and preserve worksets, and upload the Revit file to our designated folder. Uploads fine. Send link to the engineers and they receive the error message (see screenshot). The Autocad files listed on the error message are linked properly in both the original Revit file and the detached file.