diff --git a/be/Hosts/WmsPda.Host/Win_in.Sfs.Wms.Pda.Host/Controllers/Inventories/BalanceController.cs b/be/Hosts/WmsPda.Host/Win_in.Sfs.Wms.Pda.Host/Controllers/Inventories/BalanceController.cs
index a766181d0..6788a2414 100644
--- a/be/Hosts/WmsPda.Host/Win_in.Sfs.Wms.Pda.Host/Controllers/Inventories/BalanceController.cs
+++ b/be/Hosts/WmsPda.Host/Win_in.Sfs.Wms.Pda.Host/Controllers/Inventories/BalanceController.cs
@@ -499,33 +499,40 @@ public class BalanceController : AbpController
     {
         var productionLineItemDto = await _productionLineItemAppService.GetByProductLineCodeAndItemCodeAsync(productLine, itemCode).ConfigureAwait(false);
 
-        var locationList = new List<string>();
-        if (productionLineItemDto.RawLocationCodeListJson != null&&
-            productionLineItemDto.RawLocationCodeListJson.Length > 0)
+        if (productionLineItemDto != null )
         {
-            var temp=JsonSerializer.Deserialize<List<string>>(productionLineItemDto.RawLocationCodeListJson);
-            locationList.AddRange(temp);
-        }
+            var locationList = new List<string>();
+            if (productionLineItemDto.RawLocationCodeListJson != null &&
+                productionLineItemDto.RawLocationCodeListJson.Length > 0)
+            {
+                var temp = JsonSerializer.Deserialize<List<string>>(productionLineItemDto.RawLocationCodeListJson);
+                locationList.AddRange(temp);
+            }
 
-        if (productionLineItemDto.ProductLocationCodeListJson != null &&
-            productionLineItemDto.ProductLocationCodeListJson.Length > 0)
-        {
-            var temp = JsonSerializer.Deserialize<List<string>>(productionLineItemDto.ProductLocationCodeListJson);
-            locationList.AddRange(temp);
-        }
+            if (productionLineItemDto.ProductLocationCodeListJson != null &&
+                productionLineItemDto.ProductLocationCodeListJson.Length > 0)
+            {
+                var temp = JsonSerializer.Deserialize<List<string>>(productionLineItemDto.ProductLocationCodeListJson);
+                locationList.AddRange(temp);
+            }
 
-        //获取可用库存
-        var input = new RecommendBalanceRequestInput
-        {
-            ItemCode = itemCode,
-            Qty = decimal.MaxValue,
-            Statuses = new EditableList<EnumInventoryStatus> { EnumInventoryStatus.OK },
-            Locations = locationList,
-            IsPackingCode = isPackingCode
-        };
+            //获取可用库存
+            var input = new RecommendBalanceRequestInput
+            {
+                ItemCode = itemCode,
+                Qty = decimal.MaxValue,
+                Statuses = new EditableList<EnumInventoryStatus> { EnumInventoryStatus.OK },
+                Locations = locationList,
+                IsPackingCode = isPackingCode
+            };
 
-        var usableList = await _balanceAppService.GetUsableListAsync(input).ConfigureAwait(false);
-        return await SortByFifoAsync(usableList).ConfigureAwait(false);
+            var usableList = await _balanceAppService.GetUsableListAsync(input).ConfigureAwait(false);
+            return await SortByFifoAsync(usableList).ConfigureAwait(false);
+        }
+        else
+        {
+            throw new UserFriendlyException($"未找到 生产线【{productLine}】零件【{itemCode}】关系");
+        }
     }
 
     /// <summary>