I posted over on the Mavericks forum and though I'd try here too. I have four Mac Laptops backing up to a current gen time capsule for about a year now. Three laptops back up fine but my rMBP started giving me the "the backup disk cannot be found" error when it attempts to backup to the Time Capsule. The rMBP backups fine to a mini server and a local disk (I have three backup disks defined...). I can mount the timecapsule disk as well as the rMBP sparse image from the finder. Its a current generation time capsule with 7.7.3 firmware and my rMBP is OS 10.9.5 (so are the other Macs). The time capsule disk is near full. I have a wireless connection to both the mini server and TC. The TC is also the household router Before I start digging and potentially blow away the TC backup I wanted to check in here for suggestions short of deleting and starting over. I don't see anything specific in my search here or in online guides, perhaps a few similarities, but the sparse image is found and can be mounted via the finder.... didn't see anything for this case. I haven't tried verifying or repairing the backup. The TC and rMBP have been restarted a few times. I could just delete The TC backups and start over, but it could have some value as the other backups don't cover the first half of 2014.