I've recently ran into this problem and couldn't find any solution from browsing the forums.
There is a "Feature" that was used to create a body which no longer exists in the model. The feature itself is not used anywhere in the Feature Tree, or it just doesn't show up. None of the parts that are currently used in this model reference this feature; I checked all the sketches and features to see if I have any errors, all checks out... except the one mentioned above. Any idea what I'm doing wrong?
(SW2018 w/SP.01; Windows 10 OS)
Thank you in advance.