Opening an old bun file

I have a bun file from 2001. If I open it and choose to "Store Project Audio in its own Folder", Sonar (2016.08) simply hangs after creating some folders (Project name, Audio and MixScenes). If I untick this option, it places one wav file in my wavedata folder which puts the two wav files in this project end-to-end and then hangs. So the original wav data is recoverable, but the project is not. Fortunately, I also have a wrk file which does open and gives me the envelopes/settings etc but not the audio. Hence this project seems to be recoverable.
 
My question is whether there is a more elegant way to do this? I would have hoped Sonar would open old bun files, but perhaps that level of backward compatibility is too much to expect. I'm sure I could install an old version to do this but I'd rather not have to (and there may be gotchas with Windows 10 and old versions of Sonar - or even Cakewalk Pro).
 
Cheers, Peter.
 

Hey Peter,
Did you try opening another bun file? Did you try from a CD or did you move it to your drive first?
I'm asking because the same exact thing happened to me at first. I even tried on Sonar X3e and didn't work. Then I tried another bun from a different CD and moved it to my drive before opening it and it worked in Platinum with no issues. I think my first CD is corrupted and that's why I couldn't open the bun-- maybe the same thing is happening to you? These are from 2002, so about the same era as yours. I'm on Win 7 64.