If you select Ethernet, LWIP, and USB Device in CubeMX and press ok to return back Keil IDE. After import is done, Ethernet, LWIP, and USB Device files are NOT added into the project. "Source Group 1 is empty". You can not compile the project. are these files need to add manually into the project?
Opening CubeMX MDK Project directly, opens all the relevant files and compiles ok.
Following link:
https://www.keil.com/pack/doc/STM32Cube/General/html/cubemx_proj.html
