Tom, Do like you are going to do a PR-300 reset... hold play, song and repeat while turning on the power. That will bring up a window that will display: T-1 Ver 1.0x (date) That is the software version installed in the units... my guess is you will find the one giving the greif has an earlier software version than the other (i.e., the "x" value and date will be different). Regards, Ed Tom Hoehn <thoehn@xxxxxxxxxxxxxxxxx> wrote: Noel & list -- I borrowed one of the PR300S from church and hooked it up to a Rodgers 360 Theatre Organ. I tried to format a several new floppies to save registrations on, and got the same message for all of them : MASTER DISK - cannot format - please insert different disk -- any ideas? I took the disks back to church on the other PR300S and they formatted right away --- Tom Hoehn, Organist http://theatreorgans.com/tomhoehn Roaring Twenties Pizza and Pipes (substitute)(4/42 Wurlitzer) First United Methodist Church, Clearwater, FL (4/98 Ruffati/Wicks/Rodgers) CFTOS/Manasota/OATOS/HiloBay/CIC-ATOS/VotS-ATOS/Dairyland-ATOS/AGO ! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Find new MIDI music and Guides to Rodgers Organs at www.frogmusic.com To post send messages to: rodgersorgan@xxxxxxxxxxxxx To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgersmem.html --------------------------------- Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software ! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Find new MIDI music and Guides to Rodgers Organs at www.frogmusic.com To post send messages to: rodgersorgan@xxxxxxxxxxxxx To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgersmem.html