Using Custom Role: Print a posting transaction like invoice and this resulted to an error: "You do not have permission to edit this transaction"

1. The custom role should have permission via Setup>Users/Roles>Manage Roles>edit the role> under Permissions tab>Setup>Allow Non GL Changes
2. And under Setup>Accounting>Manage Accounting Period>edit the period>the Allow Non GL Changes should be checked
3. With the above settings, user will be allowed to print transaction in a closed period