pharmacophore comparison

Hi,
I am trying to compare structure-based pharmacophore models that contain the query feature NORMAL. However, when running the DS Pharmacophore Comparison protocol, I get an error message: citest failed.
How is the citest algorithm working? Is it only able to align pharmacophore models with the built-in features like HBA, HBD, hydrophobic,...?
Is there another possibility to compare my structure-based pharmacophores? Or do I have to write a script?
Thanks in advance!