We upgraded from 10.1 to 10.3: ArcGIS Desktop, ArcGIS Server, Geodatabase on SQL Server. We still use the sdelayer 10.1 tool to register the multiple (spatial) views on the 10.3 Geodatabase, and some people still use the existing sde service 10.1 connecting to the 10.3 Geodatabase. - See more at: http://ideas.arcgis.com/ideaView?id=087E00000005A9t&returnUrl=%2Fapex%2FideaList%3Fc%3D09a300000004x...
Hi Johan,
Just wanted to let you know that there is a KB article that has come out recently about using command line tools (10.x) against a 10.3 geodatabase is not a supported workflow.
44300 - Can ArcSDE command line tools be used against 10.3 and newer geodatabases?
-George