Verify that all the necessary folders and files have been exported to the specified ReedValve co-simulation working directory. You should see the following sub-directories:
Fluent_1: Contains Fluent's case, data, and coupling setup files.
Mechanical_2: Contains Mechanical's data and coupling setup files.
SyC: Contains System Coupling's settings file, which allows you to open the co-simulation in the System Coupling GUI.