This is a normal error if the user's account was setup with Date Checking selected and Don't allow if beyond 60 days. It is due to the transaction today passing the 60 days period.
If you want to overcome that message:
In Attaché select File then Maintain Users then Maintain.
Find the username of the user you want to allow date checking prior to 60 days.
.Select Allow any date (This will now let you check beyond 60 Days).
Press Accept to save changes made.