Thanks for all people who kindly helped me. My problem is solved. I uninstalled ActivePerl 5.12.2 and instead installed the current version - ActivePerl 5.24.0.2400 (64bit). Now, I compiled and installed OpenSSL 1.1.0 successfully. Cheers, Jing -----Original Message----- From: openssl-users [mailto:openssl-users-bounces@xxxxxxxxxxx] On Behalf Of Jeffrey Walton Sent: Thursday, September 22, 2016 3:12 PM To: OpenSSL Users <openssl-users at openssl.org> Subject: Re: Failed to install OpenSSL 1.1.0 using 'nmake install' On Wed, Sep 21, 2016 at 8:35 AM, Jing Liu <jingmliu at sina.com> wrote: > I?ve tried all my best to solve this problem but failed. Can you help me? > > - OS: Windows 10 > > - Perl: ActivePerl 5.12.2 build 1202 > > - Development environment: MS Visual Studio 2010 SP1 > > - OpenSSL version: OpenSSL 1.1.0 Have you tried Strawberry Perl instead of Active Perl? I seem to recall someone stated they were able to clear a similar issue using Strawberry Perl. Jeff -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users