I just start to use ORCA. I have done some optimization calculations. Now I am trying to do paramagnetic NMR of Fe porphyrin dimer. But it is showing the error "The chosen relativistic option is not implemented for GIAO calculations!". So anyone kindly suggest me to resolve this problem. Here is the input of my file:

!B3LYP RIJCOSX def2/J DKH DKH-DEF2-SVP DEF2-SVP/C autoaux NMR pal4 TightScf D3BJ

%cpcm

epsilon 4.9

refrac 1.45

end

%basis newgto Fe "DKH-def2-TZVP(-f)" end

newauxgto Fe "def2-TZVP/C" end

newgto H "IGLO-II" end

newauxgto H "AutoAux" end

end

%method

IntAccX 4.34,4.34,4.67

GridX 2,2,2

end

%scf

MAXITER 900

maxcore 15000

end

* xyz 0 11

coordinates.....