I have a macmini, mbp and imac backing up to a 1 tb timecapsule. the machine and iMac backup fine. The mbp keeps giving me this error: "The backup disk image /Volumes/Data/my name MacBook Pro (2).sparsebundle could not be accessed (error -1)." If I restart the TC I can run TM on my MBP without issue, but restarting TC is not a permanent fix. Ive run disk utility on the the TC and the MBP disk image, and this still persists. Any suggestions? I am actually worried that the existing backups may be flawed also. Should I just delete the MBP backups and start from scratch?