I just logged into my backuppc via the web UI and I got this error Error: Unable to connect to BackupPC server backuppc wasn't running This is the log, see the last line Code: 2011-04-26 01:00:00 Running 2 BackupPC_nightly jobs from 0..15 (out of 0..15) 2011-04-26 01:00:00 Running BackupPC_nightly -m 0 127 (pid=653) 2011-04-26 01:00:00 Running BackupPC_nightly 128 255 (pid=654) 2011-04-26 01:00:00 Next wakeup is 2011-04-26 02:00:00 2011-04-26 01:00:02 Started full backup on s1.domain.com (pid=655, share=/) 2011-04-26 01:11:50 BackupPC_nightly now running BackupPC_sendEmail 2011-04-26 01:11:51 Finished admin1 (BackupPC_nightly 128 255) 2011-04-26 01:11:52 Finished admin (BackupPC_nightly -m 0 127) 2011-04-26 01:11:52 Pool nightly clean removed 0 files of size 0.00GB 2011-04-26 01:11:52 Pool is 0.00GB, 0 files (0 repeated, 0 max chain, 0 max links), 1 directories 2011-04-26 01:11:52 Cpool nightly clean removed 8352 files of size 1.77GB 2011-04-26 01:11:52 Cpool is 21.04GB, 453656 files (1 repeated, 1 max chain, 15401 max links), 4369 directories 2011-04-26 02:00:08 Next wakeup is 2011-04-26 03:00:01 2011-04-26 03:00:02 Next wakeup is 2011-04-26 04:00:00 2011-04-26 04:00:00 Next wakeup is 2011-04-26 05:00:00 Can't fork at /usr/share/backuppc/lib/BackupPC/Lib.pm line 1313. this line reads: Code: if ( !defined($pid = open(CHILD, "-|")) ) { At 01:00 a full backup started and it lasted 257.4 minutes ( more than 4 hours, which compared to the previous full one - 237min - sounds regular) I manually restarted it and now it's running fine, but I'd like to understand what happened. Anyone has a clue?