Problem with NookColor, need quick advice!

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I'm trying to update my bro-in-laws nook from an old CM7 nightly (somewhere around 23 I think??) to 7.0.3 but I'm having a problem with clockwork recovery...I downloaded RomManager and flashed ClockworkMod. I then tried to backup and update my rom, but as soon as it restarted in recovery, it says

E:Can't mount /cache/recovery/command
E:Can't mount /cache/recovery/log
E:Can't open /cache/recovery/log
E:Can't mount /cache recovery/last_log
E:Can't open /cach/recovery/last_log

and won't allow me to do anything with it....I try to backup manually and it says can't access data or something like that. any advice would be great and hopefully fast, he's only in town for another 2 or 3 hours!

I had this happen before when I chose the wrong CWR to flash to recovery. From within ROM Manager, select 'flash clockworkmod recovery'. When asked to select your device, choose 'nook color', NOT 'nook color old'. The option for 'nook color old' isn't even available on the newer versions of Rom Manager, but it was there on older versions. Make sure you update Rom Manager, then reflash CWR as above, and it should then work.

Thank you! your post reminded me that the older versions of Nightly's (pre 7.0.1) had the problem of not showing all the apps in the market, so Rom Manager wasn't there, so I didn't think it needed updating...once I updated it allowed me to install the newest version of CWR and fixed (almost) all the problems!