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Redo Log Error Messages (4xxxx)

Author: Adam Leszczyński <aleszczynski@bersler.com>, version: 1.9.0, date: 2026-02-05

Errors indicating corrupted or unexpected redo log contents.

code 40001: "file: <file name> - block: <number> - invalid block size: <number>, header[1]: <number>"

Invalid block size in file header. Verify file integrity.

code 40002: "file: <file name> - invalid header block number: <number>, expected: <number>"

Header block number mismatch. Verify file integrity.

code 40003: "file: <file name> - invalid header[0]: <number>"

Invalid header value. Verify file integrity.

code 40004: "file: <file name> - invalid header[28-31]: <number>, <number>, <number>, <number>"

Invalid header fields. Verify file integrity.

code 40005: "file: <file name> - invalid block size: <number>, header[1]: <number>"

Header block size mismatch. Verify file integrity.

code 40006: "file: <file name> - invalid database version: <number>"

Database version in header is unexpected. You are trying to process redo log files from a database version which is not tested and might produce unknown results.

code 40007: "file: <file name> - invalid database version: <number>, expected: <number>"

Database version mismatch. Verify file source.

code 40008: "file: <file name> - invalid first scn value: <number>, expected: <number>"

First SCN in header does not match expected value.

code 40009: "file: <file name> - invalid next scn value: <number>, expected: <number>"

Next SCN in header mismatch.

code 40010: "file: <file name> - zero to read, start: <number>, end: <number>, scan: <number>"

Double-read error. Verify file integrity.