diff --git a/owlps-udp-to-http/owlps-udp-to-http.c b/owlps-udp-to-http/owlps-udp-to-http.c
index 98cae3a..0048abc 100644
--- a/owlps-udp-to-http/owlps-udp-to-http.c
+++ b/owlps-udp-to-http/owlps-udp-to-http.c
@@ -16,12 +16,14 @@
  *
  * The only HTTP request currently implemented is "ReadSimpleResults".
  * Answer in case of error:
- *   SimpleResults;NOK
+ *   SimpleResults;NOK;Explanation
  * Normal answer:
  *   SimpleResults;OK;Nb_results;Result_1;…;Result_n
- * Nb_results is the number of results in the answer.
+ * Nb_results is the number of results in the answer (number of mobiles).
  * Result_i follows this format:
- *   Mobile_MAC;Algorithm_name;X;Y;Z;Area_name
+ *   Mobile_MAC;X;Y;Z;Area_name
+ * Area_name is the name of the area or room in which the mobile is (may
+ * be empty).
  *
  * If a unknown request is received, the answer format is:
  *   UnknownRequest;NOK
@@ -298,7 +300,7 @@ void* tcp_server(void *NULL_value)
               answer_len += answer_begin_len ;
 
               answer_buf_len =
-                answer_len + answer_begin_len +
+                answer_len +
                 nb_results * OWL_CSV_RESULT_STRLEN ;
               answer = realloc(answer, answer_buf_len) ;
 
@@ -307,7 +309,7 @@ void* tcp_server(void *NULL_value)
                 {
                   char result_str[OWL_CSV_RESULT_STRLEN] ;
                   size_t result_len ;
-                  owl_result_to_csv(result_str, result->result) ;
+                  owl_result_to_csv_simple(result_str, result->result) ;
                   result_len = strlen(result_str) ;
                   answer[answer_len++] = ';' ;
                   strncpy(answer + answer_len, result_str,