xampp Array to string conversion error

Hello I installed modx in my xampp (win 7) and I get the following error:

Notice: Array to string conversion in C:\xampp\htdocs\golemas\core\xpdo\xpdo.class.php on line 575

Notice: Array to string conversion in C:\xampp\htdocs\golemas\core\xpdo\xpdo.class.php on line 575

I also changed config.core.php where needed but still I get this error. Any help would be appreciated,
Thank you

Please specify what version you have installed. This should not be occurring in current releases.

I use revolution 2.2.0-pl

thank you...

I recommend upgrading to latest. This has already been addressed in the most recent 2.2.x releases. The notice should not hurt anything however, as long as your server does not have display_errors set to On. You could also change your PHP error_reporting level to not report notices, which is not a typical production value for PHP configurations.

It is recommended that production sites have display_errors set to off, and log errors to a log file instead.

ok thanks very much for the answer!!