if(_src_method!=srcField->getDiscretization()->getStringRepr())
throw INTERP_KERNEL::Exception("Incoherency with prepare call for source field");
MEDCouplingFieldDouble *ret=MEDCouplingFieldDouble::New(MEDCouplingFieldDiscretization::getTypeOfFieldFromStringRepr(_target_method.c_str()),srcField->getTimeDiscretization());
if(_src_method!=srcField->getDiscretization()->getStringRepr())
throw INTERP_KERNEL::Exception("Incoherency with prepare call for source field");
MEDCouplingFieldDouble *ret=MEDCouplingFieldDouble::New(MEDCouplingFieldDiscretization::getTypeOfFieldFromStringRepr(_target_method.c_str()),srcField->getTimeDiscretization());