DBUA or preupgrade fails with Error :’ORA-29284: file read error’ or ‘ORA-29283: invalid file operation’ (Doc ID 2600109.1)
1) unset the ORA_NLS10 & NLS env variable
unset ORA_NLS10
unset NLS_SORT
unset NLS_LANG
unset NLS_NUMERIC_CHARACTERS
2) Re-run DBUA upgrade or preupgrade script as required.
