The unit test currently failing on the Mac buildbot (timing out) is failing on my machine (Ubuntu 11.10) with a PETSc error claiming that the vector in question is not ghosted.
I've tracked it down to the plotting from the C++ eigenvalue demo, and the call to gather() from within interpolate_vertex_values. The problem is that the Function to be plotted is created from a solution vector x from the eigenvalue problem like so: Function u(V, x); Since x does not come from a Function to begin with, it was not initialized with ghost values, so then later when u.interpolated_vertex_values is called, the call to gather() fails. Should there be a test for whether ghost values exist in either PETScVector or Function (_have_ghost_values)? On top of this, the call to plot() does not work in parallel from C++ anyway so it's easy to make the bug disappear (by moving the check in the plot function earlier to before the call to interpolate_vertex_values), but it exposes a problem with the constructor Function u(V, x); which may not make sense if x does not have the proper layout. -- Anders _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : dolfin@lists.launchpad.net Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
