Error upgrading from ojs 2.4.8 to

I am trying to upgrade my ojs 2.4.8 to ojs 3.1.1 but when i execute the command php tools/upgrade.php upgrade I got this error that I dont understand why can anybody tell what i have to do


Hi @Carlos_Alberto_Rivad,

I’ve responded to your other post – it’s best not to post the same content in multiple places, as it clutters the forum.

Alec Smecher
Public Knowledge Project Team