diff --git a/ProductionMgr/Tnb.ProductionMgr/PrdMoTaskService.cs b/ProductionMgr/Tnb.ProductionMgr/PrdMoTaskService.cs
index 0d1ecbf2..48a508ae 100644
--- a/ProductionMgr/Tnb.ProductionMgr/PrdMoTaskService.cs
+++ b/ProductionMgr/Tnb.ProductionMgr/PrdMoTaskService.cs
@@ -3059,6 +3059,10 @@ namespace Tnb.ProductionMgr
                 foreach (var prdMoTask in list)
                 {
                     BasMaterial basMaterial = await _db.Queryable<BasMaterial>().SingleAsync(x => x.id == prdMoTask.material_id);
+                    if (basMaterial == null)
+                    {
+                        throw Oops.Bah($"找不到物料{prdMoTask.material_id}");
+                    }
                     prdMoTask.material_name = basMaterial.name;
                 }
             }