Ralgen mapping register into ralf file

Hi
I have IP-XACT .xml file which have the registers with ipxact:isPresent0</ipxact:isPresent> fields. When I converted the .xml file to .ralf file using this command: “ralgen -ipxact2014 -ipxact2ralf file.xml”. It mapped all the register with this field ipxact:isPresent0</ipxact:isPresent>. How I convert .xml file into .ralf file with out the registers having this field ipxact:isPresent0</ipxact:isPresent>?