我正在尝试将cakephp从1.3.8升级到2.1.2。我已经尝试过cakephp shell升级但没有用。我收到错误
Warning: require(C:\wamp\www\cake212\lib\Cake\Error\exceptions.php) [function.require]: failed to open stream: No such file or directory in C:\wamp\www\cake212\lib\Cake\bootstrap.php on line 131
Fatal error: require() [function.require]: Failed opening required 'C:\wamp\www\cake212\lib\Cake\Error\exceptions.php' (include_path='.;C:\php\pear') in C:\wamp\www\cake212\lib\Cake\bootstrap.php on line 131
从1.x.x升级到2.x.x是个好主意吗？我遇到了困难。有什么简单的方法吗？