I'm using the Directory tab in 1.7.1. I have a stylesheet that writes out a new file name and directory for the file being processed. After executing, Kernow (Saxon?) maintains a lock on the results. The only way I can clear this so I can delete and rebuild the directories and files, is to exit Kernow. Looks like I can run another stylesheet doing something else and that will release the lock. So maybe this is a saxon interaction?