The path to the Sybase IQ Agent log is platform specific.
On UNIX systems, if the default Sybase IQ Agent port (1099) is used, the log name is: $IQDIR15/logfiles/SybaseIQAgent1099.nnn.log where nnn is the number of times you have started the agent since the directory was last cleaned out. For example, if you have started the agent three times since the last cleanup: $IQDIR15/logfiles/SybaseIQAgent1099.003.log
On Windows systems, if the user explicitly set the Sybase IQ Agent port, the log name defaults to: %ALLUSERSPROFILE%\SybaseIQ\logfiles\SybaseIQAgent_pppp.nnn.log where pppp is the port number and nnn is the number of times you have started the agent since the directory was last cleaned out. For example: C:\Documents and Settings\All Users\SybaseIQ\logfiles\SybaseIQAgent_7899.001.log.