Where is the Performance Center Administration log file? (v12.55)

Hi,

When attempting to add a Load Generator host in the Performance Center Administration web application I get the follwing message:

"Failed to create Host, please check log file for more details."

However I can't find the log file on the performance center server, and the log file location is not mentioned in the PC installation or administration guides.

Can you please tell me where the log file is?

Thanks,
Phil