<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=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jul 3, 2021, at 4:41 PM, Christos Stavrou <<a href="mailto:cstavrou@magdrivespace.com" class="">cstavrou@magdrivespace.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: TrebuchetMS; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; 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;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="">PS: The OS is indeed Ubuntu 21.04 and the MPI used is the apt-installed MPICH implementation.<o:p class=""></o:p></span></div></div></div></blockquote><br class=""></div><div>Does this compiler and MPI setup build and run something really simple like hello-world or cpi.c (comes with mpich) correctly?</div><div><br class=""></div>This will at least let you know if there’s a problem with the fundamental MPI setup.<div class=""><br class=""></div><div class="">Tony</div><div class=""><br class=""></div></body></html>