Checking if your kit is complete... Looks good Note (probably harmless): No library found for '-lm' Writing Makefile for libcluster Writing Makefile for Algorithm::Cluster Writing Makefile for Algorithm-Cluster Microsoft (R) Program Maintenance Utility Version 7.00.8882 Copyright (C) Microsoft Corp 1988-2000. All rights reserved. cl -c -nologo -O1 -MD -Zi -DNDEBUG -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DPERL_MSVCRT_READFIX -O1 -MD -Zi -DNDEBUG -DVERSION=\"1.37\" -DXS_VERSION=\"1.37\" -ID:\cpanrun\build\5-6-1\lib\CORE cluster.c cluster.c lib cru libcluster.lib cluster.obj Microsoft (R) Library Manager Version 6.00.8168 Copyright (C) Microsoft Corp 1992-1998. All rights reserved. LIB : fatal error LNK1181: cannot open input file "cru" NMAKE : fatal error U1077: 'lib' : return code '0x49d' Stop. NMAKE : fatal error U1077: 'cd' : return code '0x2' Stop.