Line 160 of Record/Generator.php:

        if (class_exists($this->_options['className'])) {
            return false;
        }

If files were previously generated into an autoloaded folder, class_exists() autoloads the class and breaks out of the Doctrine_Record_Generator::initialize() method.

The goal of the statement appears to be to avoid redefining the class in the case that generateFiles = false and the class definition is eval()'d into the script by Doctrine_Record_Generator::generateClass().

At first glance it looks like the check is not necessary if generateFiles = true, in fact we do want the new class definition to be loaded eventually by Doctrine_Import_Builder::writeDefinition().

Possible fix:

        if ($this->_options['generateFiles'] == false && class_exists($this->_options['className'])) {
            return false;
        }

This will fail at the && and avoid autoloading the class. It seems appropriate to move this to a refactored Doctrine_Record_Generator::generateClass().