增加报错代码

WarehouseMgr/Tnb.WarehouseMgr/WmsEmptyInstockService.cs

@@ -87,10 +87,10 @@ namespace Tnb.WarehouseMgr
                 if (sPoint != null && ePoint != null)
                 {
                     var points = await _wareHouseService.PathAlgorithms(sPoint.id, ePoint.id);
+                    if (points.Count <= 2) throw new AppFriendlyException("该路径不存在", 500);
                     //根据获取的路径点生成预任务,生成顺序必须预路径算法返回的起终点的顺序一致（预任务顺序）
-                    if (points?.Count > 0)
+                    else
                     {
-                        if (points.Count <= 2) throw new AppFriendlyException("该路径不存在", 500);
                         var preTasks = points.Where(it => !it.location_id.IsNullOrEmpty()).GroupBy(g => g.area_code).Select(it =>
                         {
                             var sPoint = it.FirstOrDefault();
@@ -153,6 +153,10 @@ namespace Tnb.WarehouseMgr
                     }
 
                 }
+                else 
+                {
+                    throw new AppFriendlyException("起始库位不可用或无可用的目标库位",500);
+                }
 
                 await _db.Ado.CommitTranAsync();
             }