Log files of TEPS, TEMA, and TEP

taken from developerworks....

Here is a link to the online docs:
http://www.ibm.com/developerworks/wikis/display/tivolidoccentral/Tivoli+Monitoring

the infos you need are contained in the troubleshooting Guide Chapter 3.
there you will also find further info to read the traces and set trace logging

here the link as html
http://publib.boulder.ibm.com/infocenter/tivihelp/v15r1/topic/com.ibm.itm.doc_6.2.1/pdg_itm62.htm