I have several linked 2013 models; each with their own links to data sources, queries, calculated DAX measures, etc. After making a copy, I installed Excel 2016 (64-bit) and opened the file. All seemed well, until I went to look at the Powerpivot tables and queries..the tables did not migrate over; nothing was showing up in data view or data relationship. Do I have to rebuild my 2013 models in order to upgrade to Excel 2016?