On Thursday 26 February 2015 at Deltares an internal OpenMI training was held. 19 participants learned about the basic concepts of OpenMI, the theoretical background of model coupling, OpenMI example projects and how to migrate code to OpenMI compliance. In an hands-on case the participants coupled a SOBEK 3 channel flow model and an RTC-Tools control model via OpenMI. The SOBEK model represents a section of the Elbe river (Germany) with two branches and a weir. The RTC-Tools model contains a control scheme that opens the weir during high water and closes the weir during low conditions. The training was given by Bernhard Becker and Andreas Burzel (both Deltares). All participants have a water-related background, but in different disciplines: operational forecasting, policy making, risk assessment, hydraulics, water quality, river engineering and ecology.