Hello, we've found the problem. We modified the makefile LIBS and now we can run the make. LIBS = $(LIBDIR)/nutinit.o $(MODS) -lnutpro -lnutfs -lnutnet -lnutdev -lnutarch -lnutcrt -lnutnet -lnutdev -lnutos Mit freundlichen Grüssen / Best regards / Üdvözlettel, Zoltán MARTON