I have fixed the typos and prepared an updated release version.
If I remember correctly, the boundary conditions in the modal dynamic step should be the same as in the preceding frequency step. No new boundary conditions are allowed. PrePoMax uses op=New and then redefines the boundary conditions in the next step, but this does not work for the modal dynamic step. So I had no other solution than to prevent the creation of new boundary conditions in the modal dynamic step and remove the op=New parameter. Is there a better way?