translation shortcut __ don't work :/

[YopSolo]

$this->_('hello')); work as described in the doc
but
get Fatal error: Call to undefined function __() when using the shortcut __('hello');

[adaniello]

This seems not an Atomik issue, but a not valid PHP version or a missing PHP configuration: _() is a native alias of php function gettext (http://php.net/manual/en/function.gettext.php). Check your locale settings in your environment.

[YopSolo]

The simple underscore function works as intended, I was refering to the double underscore function __() as described in the atomik documentation
http://atomikframework.com/docs/translations.html#translating-strings

[adaniello]

Ok, but you reported:
"get Fatal error: Call to undefined function _()", with simple underscore.
If is this the error message, usually there are two reasons:

1. user permissions for sessions folder or application file (rare);
2. misconfiguration for locales (in Atomik for "Translations");