By default, the Essbase agent log file is encoded to the locale specified by the ESSLANG variable defined for Essbase Server. You can use the UNICODEAGENTLOG configuration setting to write the agent log file in UTF-8 encoding. With a UTF-8 font, all characters in the log file should be readable. See the Oracle Essbase Technical Reference.
Application and outline change log files for databases in Unicode-mode applications are UTF-8 encoded. To view:
Application logs, use Log Viewer or Log Analyzer in Administration Services, or a UTF-8 editor
Outline change logs, use a UTF-8 editor
You cannot change the encoding of log files related to Unicode-mode applications to non-Unicode encoding.