[phenixbb] phenix.polder how to select atoms by _struct_asym.id

Hi everyone, I would like to generate polder maps in phenix of selected ligand molecules using mmCIF files. For me, the most convenient way of selecting atoms of ligand was to use  "_struct_asym.id". Therefore I tried syntax selection segid but I received error "no atoms selected". In pymol similar syntax "segi" works for the same mmCIF file. What can be the reason of the error? Is it a way to select atoms of ligand using "_struct_asym.id" in phenix.polder? Best regards, Agnieszka