On Workbench's Project Schematic, verify the state of each Setup cell, as follows:
The Setup cell for both the Transient Structural and the Fluid-Flow (Fluent) systems are in an Up-to-Date ( ) state.
The Setup cell for the System Coupling system should be in an Attention Required ( ) state. If it is in a Refresh Required ( ) state, right-click the cell and select Refresh.
With the setup cells in these states, the partial setup is ready to be exported.
Tip: This tutorial exports a partial co-simulation setup. To export a full setup, you would complete the co-simulation setup in Workbench, not performing the export until the System Coupling system is also in an Up-to-Date ( ) state.