diff --git a/src/utils/tools.js b/src/utils/tools.js
index 766ef8d7..f866a885 100644
--- a/src/utils/tools.js
+++ b/src/utils/tools.js
@@ -785,7 +785,11 @@ export function computeScore (data) {
   let k = 0
   let totalScore = 0
   const scoreArr = []
+  let num = 0
   Object.keys(data).forEach(t => {
+    if (!data[t]) {
+      num += 1
+    }
     if (t === 'establishLatencyMs' || t === 'tcpLostlenPercent' || t === 'pktRetransPercent') {
       k = 0.3
     } else if (t === 'httpResponseLatency' || t === 'sslConLatency') {
@@ -821,6 +825,9 @@ export function computeScore (data) {
   if (totalScore > 6) {
     totalScore = 6
   }
+  if (num === 5) {
+    return '-'
+  }
   return totalScore
 }
 
diff --git a/src/views/charts2/charts/networkOverview/NetworkOverviewLine.vue b/src/views/charts2/charts/networkOverview/NetworkOverviewLine.vue
index c7383877..d75a272b 100644
--- a/src/views/charts2/charts/networkOverview/NetworkOverviewLine.vue
+++ b/src/views/charts2/charts/networkOverview/NetworkOverviewLine.vue
@@ -534,7 +534,9 @@ export default {
     this.timer = setTimeout(() => {
       if (this.lineTab) {
         const data = this.mpackets.find(t => t.class === this.lineTab)
-        this.activeChange(data, data.positioning)
+        if (data && data.positioning) {
+          this.activeChange(data, data.positioning)
+        }
       } else {
         this.init()
       }