<div dir="ltr"><div style="font-family:arial,sans-serif;font-size:13px"><div><div><div><div>Hi,<br><br></div>I am having issues applying landmarks to FEM registration and would appreciate any help to resolve it. <br><br></div>I am following the example in RegistrationITKv4/DeformableRegistration11 with the following modification:<br><br>  //Add landmartks<br>  RegistrationType::PointType SourceLandmark;<br>  RegistrationType::PointType TargetLandmark;<br><br>SourceLandmark[0] = 23;SourceLandmark[1] = 12;SourceLandmark[2] = 41;<br>  TargetLandmark[0] = 26;TargetLandmark[1] = 16;TargetLandmark[2] = 45;<br>  registrationFilter->AddLandmark(SourceLandmark,TargetLandmark);<br><br>registrationFilter->SetUseLandmarks(true);<br><br><br></div>I get a run time error: "Vector subscript out of range".<br><br></div>The call stack is as follows:<br>>    msvcp90d.dll!std::_Debug_message(const wchar_t * message=0x000000013fa48fc8, const wchar_t * file=0x000000013fa49010, unsigned int line=779)  Line 24    C++<br>     HybridRegistration.exe!std::vector<itk::fem::Element const * __ptr64,std::allocator<itk::fem::Element const * __ptr64> >::operator[](unsigned __int64 _Pos=0)  Line 780    C++<br>     HybridRegistration.exe!itk::fem::FEMRegistrationFilter<itk::Image<float,3>,itk::Image<float,3>,itk::fem::FEMObject<3> >::ApplyLoads(itk::Size<3> ImgSz={...}, double * scaling=0x0000000000000000)  Line 410 + 0x35 bytes    C++<br>     HybridRegistration.exe!itk::fem::FEMRegistrationFilter<itk::Image<float,3>,itk::Image<float,3>,itk::fem::FEMObject<3> >::MultiResSolve()  Line 1173    C++<br>     HybridRegistration.exe!itk::fem::FEMRegistrationFilter<itk::Image<float,3>,itk::Image<float,3>,itk::fem::FEMObject<3> >::RunRegistration()  Line 169    C++<br>     HybridRegistration.exe!main(int argc=1, char * * argv=0x0000000002546b40)  Line 225    C++<br>     HybridRegistration.exe!__tmainCRTStartup()  Line 586 + 0x19 bytes    C<br>     HybridRegistration.exe!mainCRTStartup()  Line 403    C<br><br><br></div><span style="font-family:arial,sans-serif;font-size:13px">Thanks</span><br><div><span style="font-family:arial,sans-serif;font-size:13px">Vikas</span></div></div>