Check your usage of MgMap constructor and Open/Create/Save methods. This sounds similar to: http://osgeo-org.1560.x6.nabble.com/Trouble-after-2014-to-2017-migration-td5431529.html - Jackie -- Sent from: http://osgeo-org.1560.x6.nabble.com/MapGuide-Users-f4182607.html