Dear Duners,<div><br></div><div>I just got through the How to and tried to explore the poisson.cc and diffusion.cc delivered with the how to source.</div><div><br></div><div>While trying this i got the following error:</div><div><br></div><div><span style="white-space: pre-wrap">    In file included from /usr/local/include/dune/pdelab/backend/istl/descriptors.hh:8:0,</span></div><div><span style="white-space: pre-wrap">                 from /usr/local/include/dune/pdelab/gridfunctionspace/gridfunctionspace.hh:27,</span></div><div><span style="white-space: pre-wrap">                 from /home/justus/test/dune-test/src/poisson.hh:38,</span></div><div><span style="white-space: pre-wrap">                 from /home/justus/test/dune-test/src/dune-test.cc:5:</span></div><div><span style="white-space: pre-wrap;">  </span><span style="white-space: pre-wrap">/usr/local/include/dune/pdelab/backend/istl/matrixhelpers.hh:14:48: fatal error: </span><span style="white-space: pre-wrap;">       </span><span style="white-space: pre-wrap;">      </span></div><div><span style="white-space: pre-wrap;">       </span><span style="white-space: pre-wrap;">dune/pdelab/ordering/orderingbase.hh: No such file or directory</span></div><div><span style="white-space: pre-wrap;">      </span><span style="white-space: pre-wrap"> #include <dune/pdelab/ordering/orderingbase.hh></span></div><div><span style="white-space: pre-wrap"><br></span></div><div><span style="white-space: pre-wrap">An equivalent error occured while trying to build diffusion.cc.</span></div><div><span style="white-space: pre-wrap"><br></span></div><div><span style="white-space: pre-wrap">After receiving this error i tried to search for this file/class in the documentation.</span></div><div><span style="white-space: pre-wrap">I was not able to find it there.</span></div><div><span style="white-space: pre-wrap"><br></span></div><div><span style="white-space: pre-wrap">Do you have any ideas how to get around this error?</span></div><div><span style="white-space: pre-wrap"><br></span></div><div><span style="white-space: pre-wrap">Greetings,</span></div><div><span style="white-space: pre-wrap">Justus</span></div><div><span style="white-space: pre-wrap"><br></span></div>