Japan’s Supreme Court has upheld a high court decision that acquitted the developer of the widely used Winny software of abetting illegal copying of movies, games, and other content over the internet, the top court said Tuesday.

Under Japan’s Code of Criminal Procedure, prosecutors can still file an objection with the highest court against its decision. But it is limited to technicalities such as an error in the wording. The latest decision is expected to stand as the top court has rarely accepted such an objection.