<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 14 (filtered medium)">
<style><!--
/* Font Definitions */
@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:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
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.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 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="NL" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">Dear users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I encountered some basic problems when using PETSc with Fortran90. To illustrate the problem easiest I made a simple problem (attached).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">There is a petsc.f90 that contains a module with all PETSc specific coding (initializations, etc).
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I have a main with some easy declarations and calls. There also is a f90_kind for type definition (essentially for the ‘double precision’). Note that I wrap the matrices in Fortran structures so that I can keep the code
free from PETSc except petsc.f90.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">The file ‘output’ is what I get. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">The program fills two diagonal matrices of size 10. This seems to work fine.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">The call to get_info should print the number of rows and columns of a matrix: it thinks the number of columns is 0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Another routine mat_prod does matrix-matrix multiplication through MatMatMult. This seg faults.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I also tried the above with all kinds of includes instead of the ‘use’-manner. This gave the same results.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">It seems like the interfacing is not working as it should. Am I missing a ‘use’ statement or a compile option?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">strangely enough the matrix construction does work fine.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I hope anyone might shed some light on this.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thank you.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Danny<o:p></o:p></span></p>
</div>
</body>
</html>