Hi, The source base was downloaded in 02/12/2015, by "Download Zip".Is included? tests\tools\tcp.c -> \build\debug\tcp.exe with same msg: [10045] aio\usock_win.inc:484 assertion abort. Best regards, Ranier Vilela Subject: [nanomsg] Re: [10045] aio\usock_win.inc:484 assertion abort From: ttimo@xxxxxxxxx Date: Wed, 18 Feb 2015 18:35:09 -0600 To: nanomsg@xxxxxxxxxxxxx Have you looked at the pull request I submitted some months ago? Best,TTimo Sent from my iPhone On Feb 18, 2015, at 16:48, Ranier VF <ranier_gyn@xxxxxxxxxxx> wrote: Hi, I started a development with nanomsg-winxp branch. Windows XP sp3 msvc 2010 Tests with ipc protocol run fine. But, tests with tcp protocol, result in: [10045] aio\usock_win.inc:484 assertion abort. Anybody maybe know why? Best regards, Ranier Vilela