Import Projekt from CubeMX -> System Workbench can not find "main.h" ... Beginner
Problem solved!
It is not allowed to use ä, ö, ü in the name of the projekt or in the projekt path!
f.ex C:\Users\Raphael\Desktop\Workspace_STM32F4\TestprojektMitCubemx1\lalalalalaäoooo will make many building errors
Fazit: In Windows Version dont use motated vowel in projektname or projekt path !