EPR Calculations on ghost atom centre

[Liam]

Hi,

I have tried to calculate the EPR A and g tensors for an F+ centre in MgO. I however have been getting an error when trying to calculate this:

hnd_gshift: geom_tag_to_element failed

Is it possible to calculate EPR for such a centre? Any help would be greatly appreciated, I have attached the relevant input and output for this calculation.

Many thanks,

Liam