/// <summary>
        /// This method sends back the content of the tag (see reporting doc)
        /// </summary>
        /// <param name="tag">string of less than 40 characters and without spaces or non-ASCII characters</param>
        /// <returns>A string containing the file; false otherwise</returns>
        /// <exception cref="ArgumentException">If the <paramref name="tag"/> is badly formatted.</exception>
        /// <exception cref="CritSendException">In case of soap error, contains the message.</exception>
        public string GetTag(string tag)
        {
            string result = null;

            CallWebMethod(delegate(Authentication auth)
            {
                result = _client.getTag(auth, tag);
            }, true);
            return(result);
        }