<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Possibly *nix specific then, I ran the code fine on my M1 Mac mini with no issues;<div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div class=""><font face="Menlo" class="">➜ tmp cat hello.m</font></div><div class=""><font face="Menlo" class="">:- module hello.</font></div><div class=""><font face="Menlo" class=""><br class=""></font></div><div class=""><font face="Menlo" class="">:- interface.</font></div><div class=""><font face="Menlo" class="">:- import_module io.</font></div><div class=""><font face="Menlo" class="">:- pred main(io, io).</font></div><div class=""><font face="Menlo" class="">:- mode main(di, uo) is det.</font></div><div class=""><font face="Menlo" class=""><br class=""></font></div><div class=""><font face="Menlo" class="">:- implementation.</font></div><div class=""><font face="Menlo" class=""><br class=""></font></div><div class=""><font face="Menlo" class="">main(IO0, IO1) :-</font></div><div class=""><font face="Menlo" class=""> io.write_string("Hello World!\n", IO0, IO1).</font></div><div class=""><font face="Menlo" class=""><br class=""></font></div><div class=""><font face="Menlo" class="">➜ tmp ./hello</font></div><div class=""><font face="Menlo" class="">Hello World!</font></div><div class=""><font face="Menlo" class=""><br class=""></font></div><div class=""><font face="Menlo" class="">➜ tmp uname -a</font></div><div class=""><font face="Menlo" class="">Darwin Seans-Mac-mini.local 21.4.0 Darwin Kernel Version 21.4.0: Fri Mar 18 00:47:26 PDT 2022; root:xnu-8020.101.4~15/RELEASE_ARM64_T8101 arm64</font></div><div class=""><br class=""></div><div class="">So, could be something in the specific set of libraries used on your platform I guess.</div><div class="">Sorry can’t be more help.</div><div class=""><br class=""></div><div><br class=""><blockquote type="cite" class=""><div class="">On 17 May 2022, at 13:21, Van Ly <<a href="mailto:van.ly@sdf.org" class="">van.ly@sdf.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""></div></blockquote></div><br class=""></div></body></html>