Hi again Anil,
Yes, I’ve found the directory with all packages, but even if I delete them, that doesn’t solve the problem. The machines are restarted every day, so all packages have been created today.
I have read another comment about the 64 bit Oracle driver, I don’t have it installed, so I’m gonna try and have it in case that’s the problem.
Thank you so much for your reply 
Have a nice day!