Yes.....I ended up recreating the backup plans from scratch (note via clone). That worked but i lost all of the old backups as they would no restore.
thanks

Desktop Stand Alone (formerly CloudBerry).

Alexander;
I think my problems might be a commination of corrupted file on the backup media and the fact that the source files were tied to a mapped drive rather than to the domain\folder reference. I ran yesterdays backup using a full backup and domain\folder source and the backup was successful.

Do you recommend doing a "Full Backup" every time since network folders and subfolders may change from one week to the next?

"Can you send the whole log file in a PM?"
i can only drop files here - i don't have permissions to drop in to your account

RestorePoints: ProcessedCount: 0, MissedCount: 0, ExtraCount: 0
Files: ProcessedCount: 0, MissedCount: 0, ExtraCount: 0
2023-01-09 22:00:03,180 [SERV] [1] NOTICE - Performing Full backup. Reason: Force
2023-01-09 22:00:04,081 [PL] [1] WARN - Mapped path was not found: \\HCU-DC01\HCUdata\Appraisals & Real Estate
2023-01-09 22:00:04,086 [Base] [1] WARN - Win32 code: 2 (0x2) The system cannot find the file specified.
, path:F:\Appraisals & Real Estate
2023-01-09 22:00:04,089 [PL] [1] ERROR - File not found
System.IO.FileNotFoundException
Could not find file 'F:\Appraisals & Real Estate'.
at anz.A(Int32 , String )
at aNK.G()
at acH.KF(String , String , Boolean )

2023-01-09 22:00:04,090 [PL] [1] WARN - Path was not found: F:\Appraisals & Real Estate
2023-01-09 22:00:04,111 [PL] [1] WARN - No access to 0 files / folders; Code - 1601
2023-01-09 22:00:04,116 [PL] [1] WARN - Mapped path was not found: \\HCU-DC01\HCUdata\Ashley
2023-01-09 22:00:04,117 [Base] [1] WARN - Win32 code: 2 (0x2) The system cannot find the file specified.
, path:F:\Ashley
2023-01-09 22:00:04,117 [PL] [1] ERROR - File not found
System.IO.FileNotFoundException
Could not find file 'F:\Ashley'.
at anz.A(Int32 , String )
at aNK.G()
at acH.KF(String , String , Boolean )

The paths that are specified in the log are valid - i can see and open them in the wizard. But when i exclude them from the backup everything runs fine. Is it possible that something with their mapping, or sub-folders changed since the last full backup?
I have been doing Recurring (Incremental) backups - one for each day of the week, plus a weekly backup . Should i do a "Full Backup" instead as these are network folders and subfolders may be added and deleted?