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<div class="moz-cite-prefix">On 29.10.2012 13:49, w_ang_temp wrote:<br>
</div>
<blockquote
cite="mid:611bda2d.10ae0.13aac91f0d5.Coremail.w_ang_temp@163.com"
type="cite">
<div style="line-height: 1.7; color: rgb(0, 0, 0); font-size:
14px; font-family: arial;">
<div>Hello, Jed</div>
<div> I use the command:</div>
<div> mpiexec -n 4 ./ex4f -ksp_type cgs -pc_type gamg
-pc_gamg_agg_nsmooths 1 -ksp_rtol 1.0e-15
-ksp_converged_reason</div>
<div> The error is as follows:<br>
[0]PETSC ERROR: --------------------- Error Message
------------------------------------<br>
[0]PETSC ERROR: Unknown type. Check for miss-spelling or
missing external package needed for type<br>
seehttp://www.mcs.anl.gov/petsc/petsc-as/documentation/installation.html#external!<br>
[0]PETSC ERROR: Unable to find requested PC type gamg!<br>
[0]PETSC ERROR:
------------------------------------------------------------------------<br>
<big><b>[0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 7,
Thu Mar 15 09:30:51 CDT 2012 </b></big><br>
</div>
</div>
</blockquote>
<br>
<p>You should use petsc-3.3-p3.</p>
<br>
<br>
<blockquote
cite="mid:611bda2d.10ae0.13aac91f0d5.Coremail.w_ang_temp@163.com"
type="cite">
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style="line-height:1.7;color:#000000;font-size:14px;font-family:arial">
<div>[0]PETSC ERROR: See docs/changes/index.html for recent
updates.<br>
[0]PETSC ERROR: See docs/faq.html for hints about trouble
shooting.<br>
[0]PETSC ERROR: See docs/index.html for manual pages.<br>
[0]PETSC ERROR:
------------------------------------------------------------------------<br>
[0]PETSC ERROR: ./ex4f on a arch-linu named ubuntu by geo Mon
Oct 29 05:40:13 2012<br>
[0]PETSC ERROR: Libraries linked from /home
/geo/soft/petsc/petsc-3.2-p7/arch-linux2-c-opt/lib<br>
[0]PETSC ERROR: Configure run at Mon Jul 2 20:33:17 2012<br>
[0]PETSC ERROR: Configure options
--with-mpi-dir=/home/geo/soft/mpich2
--download-f-blas-lapack=1 --with-x=1 --with-debugging=0
--download-parmetis --download-mumps --download-scalapack
--download-blacs<br>
[0]PETSC ERROR:
------------------------------------------------------------------------<br>
[0]PETSC ERROR: PCSetType() line 67 in
src/ksp/pc/interface/pcset.c<br>
[0]PETSC ERROR: PCSetFromOptions() line 184 in
src/ksp/pc/interface/pcset.c<br>
[0]PETSC ERROR: KSPSetFromOptions() line 286 in
src/ksp/ksp/interface/itcl.c</div>
<div> When I use 'mpiexec -n 4 ./ex4f -ksp_type cgs -pc_type
sor -ksp_rtol 1.0e-15 -ksp_converged_reason', it is ok. So</div>
<div>what is the possible reason?</div>
<div> Thanks.</div>
<div> Jim</div>
</div>
<br>
<span title="neteasefooter"><span id="netease_mail_footer"></span></span>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Regards,
Alexander</pre>
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