Hi<br><br>I am running Pylith on Mac OS X 10.6.2 from the pre-compiled binary distribution pylith-1.4.2-darwin-i386. The elastic example problems run ok but with the viscoelastic problems in the twohex8 directory I run into &quot;PETSC ERROR&quot;. The start of the Traceback is pasted below. <br>

<br>I found what looked like a similar problem in the CIG-Short archive (Sept 2008) and this was a 32 v. 64 bit issue on Linux. However, if this is the problem, I&#39;m not sure how to implement the workaround for Mac OS X. <br>

<br>Many thanks<br><br>Isabelle Ryder<br>--------------<br clear="all">bash-3.2$ pylith axialdisp.cfg<br> &gt;&gt; /Users/buildbot/install/x86_darwin_single_nosched_binbot/lib/python2.3/si<br>packages/pylith/utils/PetscManager.py:48:initialize<br>

 -- petsc(info)<br> -- Initializing PETSc.<br>[0]PETSC ERROR: ...<br><br>Traceback (most recent call last):<br>  File &quot;&lt;string&gt;&quot;, line 1, in ?<br>  File &quot;/Users/buildbot/install/x86_darwin_single_nosched_binbot/lib/python2.<br>

ite-packages/pythia-0.8.1.9-py2.3.egg/pyre/schedulers/__init__.py&quot;, line 53, <br>jobstart<br>  File &quot;/Users/buildbot/install/x86_darwin_single_nosched_binbot/lib/python2.<br>ite-packages/pythia-0.8.1.9-py2.3.egg/pyre/applications/__init__.py&quot;, line 41<br>

n start<br>  File &quot;/Users/buildbot/install/x86_darwin_single_nosched_binbot/lib/python2.<br>ite-packages/pythia-0.8.1.9-py2.3.egg/pyre/applications/Shell.py&quot;, line 142, <br>run<br>  File &quot;/Users/buildbot/install/x86_darwin_single_nosched_binbot/lib/python2.<br>

ite-packages/pythia-0.8.1.9-py2.3.egg/pyre/applications/SuperScript.py&quot;, line<br>, in execute<br>  File &quot;/Users/buildbot/install/x86_darwin_single_nosched_binbot/lib/python2.<br>ite-packages/pythia-0.8.1.9-py2.3.egg/pyre/applications/SuperScript.py&quot;, line<br>

, in main<br><br>