Trying to compile dolfin from source the execution stops on SLEPc or PETSc giacomo@elrond:~/opt/fenics/dolfin-1.2.0/build$ make .... [ 58%] Building CXX object dolfin/CMakeFiles/dolfin.dir/la/LinearSolver.cpp.o [ 59%] Building CXX object dolfin/CMakeFiles/dolfin.dir/la/TensorProductMatrix.cpp.o [ 59%] Building CXX object dolfin/CMakeFiles/dolfin.dir/la/SLEPcEigenSolver.cpp.o /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp: In member function ‘void dolfin::SLEPcEigenSolver::get_eigenvalue(double&, double&, std::size_t) const’: /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp:201:39: error: cannot convert ‘double*’ to ‘PetscScalar* {aka std::complex*}’ for argument ‘3’ to ‘PetscErrorCode EPSGetEigenvalue(EPS, PetscInt, PetscScalar*, PetscScalar*)’ /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp: In member function ‘void dolfin::SLEPcEigenSolver::get_eigenpair(double&, double&, dolfin::PETScVector&, dolfin::PETScVector&, std::size_t) const’: /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp:237:58: error: cannot convert ‘double*’ to ‘PetscScalar* {aka std::complex*}’ for argument ‘3’ to ‘PetscErrorCode EPSGetEigenpair(EPS, PetscInt, PetscScalar*, PetscScalar*, Vec, Vec)’ /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp: In member function ‘void dolfin::SLEPcEigenSolver::set_spectrum(std::string)’: /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp:337:51: error: could not convert ‘((dolfin::SLEPcEigenSolver*)this)->dolfin::SLEPcEigenSolver::.dolfin::Variable::parameters.dolfin::Parameters::operator[](std::basic_string(((const char*)"spectral_shift"), (*(const std::allocator*)(& std::allocator()))))’ from ‘dolfin::Parameter’ to ‘PetscScalar {aka std::complex}’ /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp:342:51: error: could not convert ‘((dolfin::SLEPcEigenSolver*)this)->dolfin::SLEPcEigenSolver::.dolfin::Variable::parameters.dolfin::Parameters::operator[](std::basic_string(((const char*)"spectral_shift"), (*(const std::allocator*)(& std::allocator()))))’ from ‘dolfin::Parameter’ to ‘PetscScalar {aka std::complex}’ /home/giacomo/opt/fenics/dolfin-1.2.0/dolfin/la/SLEPcEigenSolver.cpp:347:51: error: could not convert ‘((dolfin::SLEPcEigenSolver*)this)->dolfin::SLEPcEigenSolver::.dolfin::Variable::parameters.dolfin::Parameters::operator[](std::basic_string(((const char*)"spectral_shift"), (*(const std::allocator*)(& std::allocator()))))’ from ‘dolfin::Parameter’ to ‘PetscScalar {aka std::complex}’ make[2]: *** [dolfin/CMakeFiles/dolfin.dir/la/SLEPcEigenSolver.cpp.o] Error 1 make[1]: *** [dolfin/CMakeFiles/dolfin.dir/all] Error 2 make: *** [all] Error 2 Many Thanks for answers. Giacomo

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