diff --git a/WarehouseMgr/Tnb.WarehouseMgr/WmsMaterialSignHService.cs b/WarehouseMgr/Tnb.WarehouseMgr/WmsMaterialSignHService.cs
index 6878ab8c..71548d40 100644
--- a/WarehouseMgr/Tnb.WarehouseMgr/WmsMaterialSignHService.cs
+++ b/WarehouseMgr/Tnb.WarehouseMgr/WmsMaterialSignHService.cs
@@ -428,7 +428,7 @@ namespace Tnb.WarehouseMgr
                                     ["pk_org"] = erpOrg.pk_org,
                                     ["pk_org_v"] = erpOrg.pk_org_v,
                                     ["vbatchcode"] = item.code_batch,
-                                    ["vfree1"] = wmsCarryCode.auxprop_xph,
+                                    ["vfree1"] = wmsCarryCode?.auxprop_xph,
                                 });
                             }
                             erpRequestData.Add("dtls", erpRequestDataDetails);