I was running into this Error Code in Adobe Encore CS6 "OSStatus Error = -37 "and couldn't find any help online. After a few days of racking my brain, I finally had a breakthrough, and thought I would post so that anyone else who came across this would know how to fix it.
Its a simple fix. The error code is occurring because the name of my video files I was trying to import had a "/" in the title. I simply changed the file name and took out the "/", and the problem was solved.