I installed OMNet++ 6.03 and INET 4.5 on Windows 11. While I can simulate INET examples without any issues, I’m having trouble running the showcases.

When I double-click on the omnetpp.ini file, it reports that it cannot find the network to simulate. Unlike the INET examples, I don’t see any NED files in the showcases. Does anyone have an idea on how to run an INET showcase simulation? What mistake might I be making? How to get NED files for INET showcases?