To diagnose font usage and issues, you can view the log files in either of the following ways:
To view the log files using the command line:
Open the diagnostics log file:
$ORACLE_INSTANCE/diagnostics/logs/ReportsServerComponent/server_name/rwEng-id_diagnostics.log
Notice that the font used for each object in the report is logged without any ambiguity. If a TTF font file was not found, it is logged and noted that the pre-11g mechanism was used for finding the appropriate font, which is also logged.
Refer to Section 6.11.1, "Viewing and Searching Log Files" in Chapter 6, "Administering Oracle Reports Services Using Oracle Enterprise Manager"