I have logged in as you on okanagan and run CALIB on your source catno 87 disk 2 with a variety of SOLINTs. All were honored as expected. Perhaps it was not working yesterday - it was rebuild last night by the MNJ. Note that it will divide the 8:20 into equal intervals if possible - so your 1 minute request is actually 8 intervals of 1+20/8 ~ 63 sec. Cheers, Eric