generated isos are not saved in copied project in cadison

iam working on two project which are exactly same, with slight changes in routing. i have done with first project , for secod project i copied evrything to the new project database and edited it for the modifications nedded. for this Iam working in cadison. in the copied project while generating isos, isos are generated with line nos. missing. also are not saved. anyone has idea why the isos are not saved.