how to convert file from higher version to lower version
3 Answers
I don't think converting is possible. But if you have ServicePack 5 of 2015 then you should be able to at least open a 2016 model in 2015...will be limited in what you can do with it but you can at least view the file...don't remember if it lets you save out as a step file or not while in 2015. Other options would be find a program that can open a SW file and save out as a STP file to reopen in SW2015 or go back to model source and try to get them to save out as a STP so can be imported into SW2015.
you can upload it to https://www.3dcontentcentral.com/
the seit will provide you the model with older version
try it