When I looked at the file the counterbore was concentrically mated to the screw which SOLIDWORKS did not like. All i had to do is delete that concentric relationship and the error went away. However, there is still some funky stuff that is going on with this assembly which is beyond this error.
Hope this helps,
D584 AS Bipart slider.SLDASM.zip 709.8 KB
Thanks for your reply. Just wondering because this doesn't happen on 2015. Can you explain further about what are the "funky stuff" in the assembly? Please. Regards