Troubleshooting with the Migration Log File
The migration objects record problems to a text log file in the directory specified by the "LogFilePath" registry key. The log file will contain reports of migration failures and events that prevented successful migration. Additional migration failure information will be logged using the data returned by the failing object.
A new log file is automatically created and used whenever the number of lines in the current log file reaches the limit defined by the "MaxNumLinesEachFile" registry key.