diff --git a/be/Modules/Inventory/src/Win_in.Sfs.Wms.Inventory.Domain/Balances/BalanceManager.cs b/be/Modules/Inventory/src/Win_in.Sfs.Wms.Inventory.Domain/Balances/BalanceManager.cs
index d0c19e6a6..526f26173 100644
--- a/be/Modules/Inventory/src/Win_in.Sfs.Wms.Inventory.Domain/Balances/BalanceManager.cs
+++ b/be/Modules/Inventory/src/Win_in.Sfs.Wms.Inventory.Domain/Balances/BalanceManager.cs
@@ -192,6 +192,15 @@ public class BalanceManager : DomainService, IBalanceManager
         Logger.LogDebug($"{transaction.DocNumber}|BeforeOutBound:{existBalance}");
         if (transaction.ManageType == EnumItemManageType.SingleUnit)
         {
+            if (existBalance == null)
+            {
+                throw new UserFriendlyException($"库位在{transaction.LocationCode}," +
+                                                $"物品编号为{transaction.ItemCode}," +
+                                                $"箱码为{transaction.PackingCode}," +
+                                                $"批次为{transaction.Lot}," +
+                                                $"状态为{transaction.Status.GetDisplayName()}" +
+                                                $"的库存未找到");
+            }
             //检查出库数量与库存数量是否一致
             transaction.CheckSingleUnitQtyEqual(existBalance.Qty);
 
@@ -263,6 +272,16 @@ public class BalanceManager : DomainService, IBalanceManager
             balance.Status
         ).ConfigureAwait(false);
 
+        if (existBalance == null)
+        {
+            throw new UserFriendlyException($"库位在{balance.LocationCode}," +
+                                            $"物品编号为{balance.ItemCode}," +
+                                            $"箱码为{balance.PackingCode}," +
+                                            $"批次为{balance.Lot}," +
+                                            $"状态为{balance.Status.GetDisplayName()}" +
+                                            $"的库存未找到");
+        }
+
         //if (!existBalance.IsActive)
         //{
         //    throw new UserFriendlyException(
@@ -318,9 +337,8 @@ public class BalanceManager : DomainService, IBalanceManager
 
     protected virtual async Task<Balance> GetFirstAsync(string packingCode, string itemCode, string lot, string locationCode, EnumInventoryStatus enumInventoryStatus)
     {
-
         var balance = await _balanceRepository
-            .FindAsync(p => p.ItemCode == itemCode
+            .FirstOrDefaultAsync(p => p.ItemCode == itemCode
                             && p.LocationCode == locationCode
                             && p.Lot == lot
                             && p.PackingCode == packingCode