Checking if your kit is complete... Looks good Writing Makefile for CzFast Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. cp CzFast.pm blib\lib\CzFast.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 CzFast.xs > CzFast.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv CzFast.xsc CzFast.c cl -c -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=\"0.10\" -DXS_VERSION=\"0.10\" "-IC:\cpanrun\build\5-10-0\lib\CORE" CzFast.c CzFast.c CzFast.xs(79) : warning C4101: 'e' : unreferenced local variable CzFast.xs(117) : error C2057: expected constant expression CzFast.xs(117) : error C2466: cannot allocate an array of constant size 0 CzFast.xs(117) : error C2133: 'str_to' : unknown size NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.