note syphilis Interesting ... the OP is using VC10 (presumably an x64 build thereof).<br>Does anyone here use VC10 to build an x64 perl ?<br>Does anyone anywhere use *any* version of VC to build an x64 perl ?<br>ActiveState (still, afaik) don't - they use the Platform SDK compiler, which builds x64 perl-5.16.0 just fine. <br><br>Cheers,<br>Rob 994828 994828