diff --git a/src/views/modules/base/maintainProductRouting.vue b/src/views/modules/base/maintainProductRouting.vue
index 608086a..91a0af1 100644
--- a/src/views/modules/base/maintainProductRouting.vue
+++ b/src/views/modules/base/maintainProductRouting.vue
@@ -1568,9 +1568,16 @@
             })
               return false;
           }
-          let size=this.dataList2.length;
+          let size;
+          let itemNo;
+          if(this.dataList2){
+            size=this.dataList2.length;
+            itemNo=this.dataList2[Number(size-1)].itemNo+10;
+          }else {
+            itemNo=10;
+          }
           this.detailData={
-            itemNo:this.dataList2[Number(size-1)].itemNo+10,
+            itemNo:itemNo,
             operationDesc:'',
             workCenterNo:'',
             machSetupTime:0,