First, you've got to swap these lines -- you need to do the SETs before you do the ATTACHes: > ATTACH RQ0 vaxvmsssys.iso > SET RQ0 RA90 > ATTACH RQ1 vaxvmscd.iso > SET RQ1 RRD40 >>>> boot dual1 > (BOOT/R5:0 DUAL1 You should be booting from DUA1... you've got an extraneous "L" in there. See if those changes work better. Good luck! --Marc