Have tried but can't seem to get this to work with 1.5.1
This is what I have, using 1.51.
PHP Code:

// steve check for and display debug logs 
$path str_replace(DIR_FS_CATALOG,'../',DIR_FS_LOGS).'/';
    
$matches glob($path ."myDEBUG*.*");
    if (
is_array($matches)) {
        foreach (
$matches as $filename) {
        
$messageStack->add('Debug log file exists: '.str_replace($path,DIR_FS_LOGS.'/',$filename),'warning');
        }
    }