Unexpected error occurred while loading the data for the screen. Refer to the log for details.
Above is error I get when I log on to OEM GC 10g r5 with AMP 3.3 installed. I navigate to "Oracle Applications", I choose my instance (PROD), and get the above message when I click on either of two tabs - Diagnostics or User Monitoring. I want to further investigate this error, but no mention is made of where the log might, just that I should read it.