Hi, I am producing a very large (50MB) XML file via a transformation. Once the file has been produced, it passes through a validation process (another transformation) - for business rules compliance of the original data - as a result of which we occasionally need to examine the xml file in an editor. When I use oXygen to view the file, it takes over 30 minutes to load. The large file viewer is of no use because it does not format the input. Without formatting, the input is just a single long line of unformatted XML. The contents of the oxygen.vmoptions file is: -Xmx1450m -Dcom.oxygenxml.language=English Oxygen is set to format and indent on load. Is there any way that oXygen can be configured to load and display the data more quickly? Cheers Peter