diff --git a/msg.go b/msg.go
index b2c6791..a4bd038 100644
--- a/msg.go
+++ b/msg.go
@@ -289,9 +289,11 @@ func parseSubTypeMessageTributesStatsAck(m *ChatWarsMessage, r *regexp.Regexp) (
 		log.Printf("parseSubTypeMessageTributesStatsAck : Date : %s => %v\n", re.ReplaceAllString(l[0], "${Date}"), tribute.Date)
 		tribute.ItemID64 = getSilentObjItemID(``, re.ReplaceAllString(l[0], "${Item}"))
 		log.Printf("parseSubTypeMessageTributesStatsAck : Item : %s => %d\n", re.ReplaceAllString(l[0], "${Item}"), tribute.ItemID64)
-		tribute.Quantity, _ = strconv.ParseInt(r.ReplaceAllString(l[0], "${Quantity}"), 10, 64)
+		tribute.Quantity, err = strconv.ParseInt(r.ReplaceAllString(l[0], "${Quantity}"), 10, 64)
+		logOnError(err, "parseSubTypeMessageTributesStatsAck : ParseInt")
 		log.Printf("parseSubTypeMessageTributesStatsAck : Quantity : %s => %d\n", re.ReplaceAllString(l[0], "${Quantity}"), tribute.Quantity)
-		tribute.Exp, _ = strconv.ParseInt(r.ReplaceAllString(l[0], "${Exp}"), 10, 64)
+		tribute.Exp, err = strconv.ParseInt(r.ReplaceAllString(l[0], "${Exp}"), 10, 64)
+		logOnError(err, "parseSubTypeMessageTributesStatsAck : ParseInt")
 		log.Printf("parseSubTypeMessageTributesStatsAck : Exp : %s => %d \n", re.ReplaceAllString(l[0], "${Exp}"), tribute.Exp)
 		cwm.Tributes = append(tributes, tribute)
 		log.Printf("parseSubTypeMessageTributesStatsAck : #%d / #%d : %d + %d (%v)\n", cwm.Msg.TGUserID64, tribute.ItemID64, tribute.Quantity, tribute.Exp, tribute.Date)