<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin-top:0cm;
margin-right:0cm;
margin-bottom:10.0pt;
margin-left:0cm;
line-height:115%;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>Hello everybody,<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>I have some questions concerning the usage Symphony (5.3.1) in a parallel environment in Visual Studio 2008 Pro.<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>In my program there are some calculations done. Within each of these loops Symphony is called to solve a MILP. To build up the MILP-model in every loop I use the methods of CoinModel. <o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>If I run my code in a sequential mode everything works fine. <o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>But running the program in a shared-memory environment by integrating OpenMP commands around the loop causes failures. Unfortunately I get heap corruption errors in these cases. Concerning this problem I found in the Symphony 5.2.3 manual that the solver runs on Windows systems only in a sequential mode. Is this also effective for the latest versions of Symphony?<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>In the same manual there's a hint that it should be easy to run Symphony in parallel on Windows systems if PVM will work. I thought that PVM is needed for distributed architectures or do I need it for my case?<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>Furthermore, I'm wondering because I only separate the "main" loop into pieces and not the Symphony calculations. According to my understanding they're still done in a sequential mode (one Symphony instance for every processor core) or am I wrong here?<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>The last question would be if anybody has some experience with this problem using Visual Studio and if anybody has a tip for me to solve this problem? That would be very helpful!<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>Many thanks in advance!<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal'><span lang=EN-US>Best regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Aiko</span><o:p></o:p></p></div></body></html>