How to enable PrintDebug in Tracker plugin

Hi Everyone,

I want to enable ‘PrintDebug’ in Tracker plugin.
I have given $GLOBALS[‘PIWIK_TRACKER_DEBUG’] = true; in Piwik.php, but not able to find the location of log file
to check debug output.
This is because sometimes actions are falling into new Visits even though the time from last Visit is less than 30mins for a user.
Can any one please help me in this issue.

Thanks in Advance

If you set $GLOBALS[‘PIWIK_TRACKER_DEBUG’] to true, the log will simply be displayed in the piwik.php output (ie. the response to the tracking request). There is no log to file at this stage for Tracker request.