public function execute()
    {
        $this->unixParams();
        $output = [];
        $return_var = 0;

        exec($this->the_command, $output, $return_var);

        if ($return_var !== 0) {
            throw new Exception(
                'Your report has an error and couldn\'t be processed! Try to output the command: '.
                escapeshellcmd($this->the_command),
                1
            );
        }

        return $output;
    }