### Upgrade of custom application Dear community, we are a company located in central Germany working with Intersystems Caché since 2003 (Jesus, that's actually a long time in IT). As we struggle to keep pace with outside development we still operate on Caché 2013.1![surprise](https://community.intersystems.com/sites/all/libraries/ckeditor/plugins/smiley/images/omg_smile.png "surprise") We are, of course, aware that we need to upgrade Caché and therefor plan an upgrade to 2017.2. Now my question to you bold ObjectScript warriors: * Did anyone do this with a legacy application (still have macro routines, the old style)? * Has anyone experienced any bigger issues with a move like this? * Are there existing checklists apart from https://docs.intersystems.com/cache20172/csp/docbook/DocBook.UI.Page.cls?KEY=GCRN\_upgrade\_intro ? * Is there even a freelancer out there willing to help identify migration issues? Our application is a medium sized ERPish application with around 250k lines of code. So a bit code to review. Many thanks for your input in advance and best regards, Udo