Error Code 19:1886 Error threshold rule at
level marked the job as partial success based on failed files criteria.
Article ID: DAPR0006 Data protection job has too many failed files
Job reports partial success with too many job failures. Backup Log file may contain entries similar to :
OpenFilesForBackup() -  Error  during lstat
Unix /proc directory was skipped with V1 indexing clients. V2 indexing clients include /proc directory. /proc directory contains temporary or working files that should not be backed up.
Problem reported in MR 173221 and fixed in SP7.
Additionally, Directories containing temporary or working files should not be filtered from data protection jobs. Files in these directories are not essential to recovery and consume unnecessary backup time and storage space. backed up. Recommended filters can be found in Books Online.