Hi @Anonymous,
As @cadffm indicated in his post, this type of conversion can be done quite easily even if you don't have the current version of AutoCAD. You can also elect to download a Trial version of current product to perform such a task.
I found that this drawing had MEP objects that did not want to save backward (not backward compatible) so from AutoCAD MEP I ran a AECtoACAD.
The resulting file still indicates that there are MEP, Civil 3D, and Architectrectural Desktop objects but the file does open OK in 2016.
Please select the Accept as Solution button if my post solves your issue or answers your question.
John Vellek
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