diff --git a/Web12306/TrainSuggestion.cs b/Web12306/TrainSuggestion.cs
index 198bba7..a10d3cd 100644
--- a/Web12306/TrainSuggestion.cs
+++ b/Web12306/TrainSuggestion.cs
@@ -131,7 +131,7 @@ namespace Web12306
 			PreProcessRequestData(ri);
 
 			//获得所有的可替换站点
-			var alllines = ri.Stops.Values.SelectMany(s => GetAlternativeLines(s, ri.Date)).ToArray();
+			var alllines = ri.Stops.Values.SelectMany(s => GetAlternativeLines(s, ri.Date)).Where(s => s != null).ToArray();
 
 			//对线路进行分组排序
 			var lineGrouped = alllines.GroupBy(s => s.LineName).Select(s =>
@@ -668,7 +668,7 @@ namespace Web12306
 		{
 			if (Key != "stupid360")
 				return true;
-			if (Stops.Values.Any(s => (s.TrainInfo.code == s.TrainInfo.from.code && s.TrainInfo.to.code == s.TrainInfo.end.code) || s.TrainInfo.available < 0))
+			if (Stops.Values.Any(s => (s.TrainInfo.code == s.TrainInfo.from.code && s.TrainInfo.to.code == s.TrainInfo.end.code)))
 				return true;
 
 			//add 2014年9月4日 - 检测非法席别
@@ -676,7 +676,7 @@ namespace Web12306
 				return true;
 			if (SelectedSeats.Length > 0)
 			{
-				if (Stops.Values.Any(s => !SelectedSeats.Any(x => s.TrainInfo.ticketMap.ContainsKey(x[0])))) 
+				if (Stops.Values.Any(s => !SelectedSeats.Any(x => s.TrainInfo.ticketMap.ContainsKey(x[0]))))
 					return true;
 			}