I get successful backups for a while, then out of the blue I get an error in the creation of the consolidation-incremental file (having set Acronis to set a small number of incrementals and then to consolidate. I attach a screenprint of the Acronis report and the content of the backup harddrive (as it regards Acronis). Any ideas? Should i simply not bother with consolidation? Is there some other possible cause? Thanks for any ideas David PS I subsequently did a validation which showed that the backup was OK - so what exactly is this error and what notice should I take of it?