diff --git a/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs b/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
index cbe51deb..1fc9e6d7 100644
--- a/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
+++ b/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
@@ -554,7 +554,7 @@ namespace Tnb.WarehouseMgr
                 //查询当前电梯点
                 var curEleDs = await _db.Queryable<WmsElevatorD>().Where(it => points.Select(x => x.id).Contains(it.point_id)).ToListAsync();
                 //如果有电梯点，则会进行电梯的均匀分配
-                if (curEleDs.Count > 0)
+                if (curEleDs?.Count > 0)
                 {
                     //当前电梯
                     var curEle = await _db.Queryable<WmsElevatorH>().SingleAsync(it => it.id == curEleDs.First().bill_id);