diff --git a/DOAN.Service/MES/Material/MmInventoryService.cs b/DOAN.Service/MES/Material/MmInventoryService.cs
index aa5e379..ab380a9 100644
--- a/DOAN.Service/MES/Material/MmInventoryService.cs
+++ b/DOAN.Service/MES/Material/MmInventoryService.cs
@@ -694,14 +694,14 @@ namespace DOAN.Service.BZFM
                 result = Context
                     .Queryable<MmRecordInbound>()
                     .WhereIF(
-                        parm.StartTime.Value > DateTime.MinValue,
+                        parm.StartTime != null && parm.StartTime.Value > DateTime.MinValue,
                         it => it.CreatedTime >= parm.StartTime
                     )
                     .WhereIF(
-                        parm.EndTime.Value > DateTime.MinValue,
+                        parm.EndTime != null && parm.EndTime.Value > DateTime.MinValue,
                         it => it.CreatedTime <= parm.EndTime
                     )
-                    .Where(it=> it.MaterialCode == parm.MaterialCode)
+                    .Where(it => it.MaterialCode == parm.MaterialCode)
                     .Where(it => it.SupplierCode == parm.SupplierCode)
                     .Where(it => it.LocationCode == parm.LocationCode)
                     .Where(it => it.BatchNo == parm.BatchNo)
@@ -723,7 +723,7 @@ namespace DOAN.Service.BZFM
                         Operator = it.Operator,
                         CreatedTime = it.CreatedTime,
                         Workorder = it.Workorder,
-                        StoveCode = it.StoveCode
+                        StoveCode = it.StoveCode,
                     })
                     .ToPage(parm);
             }
@@ -733,11 +733,11 @@ namespace DOAN.Service.BZFM
                 result = Context
                     .Queryable<MmRecordOutbound>()
                     .WhereIF(
-                        parm.StartTime.Value > DateTime.MinValue,
+                        parm.StartTime != null && parm.StartTime.Value > DateTime.MinValue,
                         it => it.CreatedTime >= parm.StartTime
                     )
                     .WhereIF(
-                        parm.EndTime.Value > DateTime.MinValue,
+                        parm.EndTime != null && parm.EndTime.Value > DateTime.MinValue,
                         it => it.CreatedTime <= parm.EndTime
                     )
                     .Where(it => it.MaterialCode == parm.MaterialCode)
@@ -759,7 +759,7 @@ namespace DOAN.Service.BZFM
                         TransactionType = it.TransactionType,
                         Operator = it.Operator,
                         CreatedTime = it.CreatedTime,
-                        Workorder = it.Workorder
+                        Workorder = it.Workorder,
                     })
                     .ToPage(parm);
             }