Yes, .interpolate() works fine. But what is the difference between 
interpolate() and project()?

Am Montag, 16. Oktober 2017 08:54:02 UTC+2 schrieb Denis Davydov:
>
> Or you may want to use interpolate if this is enough
>
> https://www.dealii.org/developer/doxygen/deal.II/namespaceVectorTools.html#a05db6c8cebf924b417dd92f525efe3db
>
> Regards,
> Denis
>
> On Friday, October 13, 2017 at 11:05:01 AM UTC+2, Maxi Miller wrote:
>>
>> I try to apply initial values to a vector defined as 
>> *LinearAlgebraTrilinos::MPI::Vector 
>> *using 
>> VectorTools::project (dof_handler, hanging_node_constraints,
>>  QGauss<dim>(fe.degree+1),
>>  InitialValues<dim>(),
>>  local_solution);
>>
>>
>>
>> When initializing the variable fe (as FESystem<dim>) with one or two 
>> components, it works fine. For more than two components I get the error
>>
>> -------------------------------------------------------- 
>> An error occurred in line <1366> of file 
>> <~/Downloads/dealii/include/deal.II/numerics/vector_tools.templates.h> in 
>> function 
>>     void dealii::VectorTools::{anonymous}::project(const 
>> dealii::Mapping<dim>&, const dealii::DoFHandler<dim>&, const 
>> dealii::ConstraintMatrix&, const dealii::Quadrature<dim>&, const 
>> dealii::Function<dim, typename VectorType::value_type>&, VectorType&, bool, 
>> const dealii
>> ::Quadrature<(dim - 1)>&, bool) [with VectorType = 
>> dealii::TrilinosWrappers::MPI::Vector; int dim = 2; typename 
>> VectorType::value_type = double] 
>> The violated condition was:  
>>     (dynamic_cast<const parallel::Triangulation<dim>* > 
>> (&(dof.get_triangulation()))==nullptr) 
>> Additional information:  
>>     You are trying to use functionality in deal.II that is currently not 
>> implemented. In many cases, this indicates that there simply didn't appear 
>> much of a need for it, or that the author of the original code did not have 
>> the time to implement a particular case. If you
>>  hit this exception, it is therefore worth the time to look into the code to 
>> find out whether you may be able to implement the missing functionality. If 
>> you do, please consider providing a patch to the deal.II development sources 
>> (see the deal.II website on how to contri
>> bute). 
>>  
>> Stacktrace: 
>> ----------- 
>> #0  /opt/dealII/lib/libdeal_II.g.so.9.0.0-pre:  
>> #1  /opt/dealII/lib/libdeal_II.g.so.9.0.0-pre: void 
>> dealii::VectorTools::project<2, dealii::TrilinosWrappers::MPI::Vector, 
>> 2>(dealii::DoFHandler<2, 2> const&, dealii::ConstraintMatrix const&, 
>> dealii::Quadrature<2> const&, dealii::Function<2, 
>> dealii::TrilinosWrappers::MPI
>> ::Vector::value_type> const&, dealii::TrilinosWrappers::MPI::Vector&, bool, 
>> dealii::Quadrature<(2)-(1)> const&, bool) 
>> #2  ./main: Step15::MinimalSurfaceProblem<2>::run() 
>> #3  ./main: main 
>> -------------------------------------------------------- 
>>  
>> [linux-lb8c:15830] *** Process received signal *** 
>> [linux-lb8c:15830] Signal: Aborted (6) 
>> [linux-lb8c:15830] Signal code:  (-6) 
>> [linux-lb8c:15830] [ 0] /lib64/libpthread.so.0(+0x12270)[0x7f294a477270] 
>> [linux-lb8c:15830] [ 1] /lib64/libc.so.6(gsignal+0x110)[0x7f2946c1f0d0] 
>> [linux-lb8c:15830] [ 2] /lib64/libc.so.6(abort+0x151)[0x7f2946c206b1] 
>> [linux-lb8c:15830] [ 3] 
>> /opt/dealII/lib/libdeal_II.g.so.9.0.0-pre(+0x6b9e5d1)[0x7f295b49e5d1] 
>> [linux-lb8c:15830] [ 4] 
>> /opt/dealII/lib/libdeal_II.g.so.9.0.0-pre(_ZN6dealii18deal_II_exceptions9internals5abortERKNS_13ExceptionBaseE+0x1a)[0x7f295b49edaf]
>>  
>> [linux-lb8c:15830] [ 5] 
>> /opt/dealII/lib/libdeal_II.g.so.9.0.0-pre(_ZN6dealii18deal_II_exceptions9internals11issue_errorINS_18StandardExceptions17ExcNotImplementedEEEvNS1_17ExceptionHandlingEPKciS7_S7_S7_T_+0x98)[0x7f2957373ea1]
>>  
>> [linux-lb8c:15830] [ 6] 
>> /opt/dealII/lib/libdeal_II.g.so.9.0.0-pre(+0x3f38e23)[0x7f2958838e23] 
>> [linux-lb8c:15830] [ 7] 
>> /opt/dealII/lib/libdeal_II.g.so.9.0.0-pre(_ZN6dealii11VectorTools7projectILi2ENS_16TrilinosWrappers3MPI6VectorELi2EEEvRKNS_10DoFHandlerIXT_EXT1_EEERKNS_16ConstraintMatrixERKNS_10QuadratureIXT_EEERKNS_8FunctionIXT1_ENT0_10value_typeEEERSH_bRKNSC_IX
>> miT_Li1EEEEb+0x2f)[0x7f295894906e] 
>> [linux-lb8c:15830] [ 8] 
>> ./main(_ZN6Step1521MinimalSurfaceProblemILi2EE3runEv+0xc08)[0x420d08] 
>> [linux-lb8c:15830] [ 9] ./main(main+0x3c)[0x414ad0] 
>> [linux-lb8c:15830] [10] 
>> /lib64/libc.so.6(__libc_start_main+0xea)[0x7f2946c09f4a] 
>> [linux-lb8c:15830] [11] ./main(_start+0x2a)[0x41477a] 
>> [linux-lb8c:15830] *** End of error message *** 
>> Abgebrochen (Speicherabzug geschrieben)
>>
>> when running in debug mode. It runs fine in release mode. Why does that 
>> happen for more than two components, and how can I fix/circumvent that? Or 
>> did I (again) forget something? 
>>
>> My minimal example is attached, the behaviour happens when setting 
>> NUM_COMPONENTS via 
>>
>> #define NUM_COMPONENTS 100
>>
>> to a value larger than 2.
>>
>>
>> Thank you!
>>
>>

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