diff --git a/src/Khd.Core.Wcs/Wcs/CreateTaskByRecord.cs b/src/Khd.Core.Wcs/Wcs/CreateTaskByRecord.cs
index 59c2bd0..f867e2f 100644
--- a/src/Khd.Core.Wcs/Wcs/CreateTaskByRecord.cs
+++ b/src/Khd.Core.Wcs/Wcs/CreateTaskByRecord.cs
@@ -833,7 +833,7 @@ namespace Khd.Core.Wcs.Wcs
                                 .Where(t => t.delFlag == "0")
                                 .Where(t => t.locationScrapType == "1")
                                 .Where(t => t.locationStatus == "1")
-                                .Where(t => t.containerCode == null)
+                                .Where(t => string.IsNullOrEmpty(t.containerCode))
                                 .Where(t => t.warehouseId == 521)
                                 .OrderByDescending(t => t.locColumn)
                                 .FirstOrDefault();