Checking if your kit is complete... Looks good Writing Makefile for Business::KontoCheck Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. cp lib/Business/KontoCheck.pm blib\lib\Business\KontoCheck.pm C:\cpanrun\build\5-10-0\bin\perl.exe C:\cpanrun\build\5-10-0\lib\ExtUtils\xsubpp -typemap C:\cpanrun\build\5-10-0\lib\ExtUtils\typemap KontoCheck.xs > KontoCheck.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv KontoCheck.xsc KontoCheck.c cl -c -I. -nologo -GF -W3 -MD -Zi -DNDEBUG -O1 -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DUSE_SITECUSTOMIZE -DPRIVLIB_LAST_IN_INC -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO -DPERL_MSVCRT_READFIX -MD -Zi -DNDEBUG -O1 -DVERSION=\"2.4\" -DXS_VERSION=\"2.4\" "-IC:\cpanrun\build\5-10-0\lib\CORE" -DINCLUDE_KONTO_CHECK_AT=1 -DINCLUDE_KONTO_CHECK_DE=1 -Wno-parentheses -Wno-uninitialized KontoCheck.c Command line error D2021 : invalid numeric argument '/Wno-parentheses' NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.