Here is what I get in the console window: c:\liblouisutdml\windows>nmake /f makefile.nmake Microsoft (R) Program Maintenance Utility Version 9.00.30729.01 Copyright (C) Microsoft Corporation. All rights reserved. make_makefile nmake /nologo /f Makefile.gen NMAKE : fatal error U1073: don't know how to make '..\liblouisutdml\sem_names.h' Stop. NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual Studio 9.0\ VC\BIN\nmake.EXE"' : return code '0x2' Stop. c:\liblouisutdml\windows> Best regards from Ohio, Vic