diff --git a/features/trace/trace.go b/features/trace/trace.go
index 05651bbd..ddeb472e 100644
--- a/features/trace/trace.go
+++ b/features/trace/trace.go
@@ -399,23 +399,25 @@ func ParseRawMsg2Html(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	log.Trace("traceData:", traceData)
-	htmlFile := fmt.Sprintf("traceDecMessage-%d-%d.html", traceData.TaskID, traceData.ID)
-	pathFile := config.GetYamlConfig().OMC.FrontTraceDir + "/" + htmlFile
-	command := fmt.Sprintf("ipdata2html -f %s -t %d -i N%d -d %x", pathFile, traceData.Timestamp, traceData.IfType, traceData.RawMsg)
-	out, err := run.ExecCmd(command, "/")
-	log.Tracef("Exec output: %v", string(out))
-	if err != nil {
-		log.Errorf("Faile to ipdate2html:", err)
-		services.ResponseInternalServerError500ProcessError(w, err)
-		return
+	pathFile := traceData.DecMsg
+	if traceData.DecMsg == "" {
+		htmlFile := fmt.Sprintf("traceDecMessage-%d-%d.html", traceData.TaskID, traceData.ID)
+		pathFile = config.GetYamlConfig().OMC.FrontTraceDir + "/" + htmlFile
+		command := fmt.Sprintf("ipdata2html -f %s -t %d -i N%d -d %x", pathFile, traceData.Timestamp, traceData.IfType, traceData.RawMsg)
+		out, err := run.ExecCmd(command, "/")
+		log.Tracef("Exec output: %v", string(out))
+		if err != nil {
+			log.Errorf("Faile to ipdate2html:", err)
+			services.ResponseInternalServerError500ProcessError(w, err)
+			return
+		}
+		traceData.DecMsg = pathFile
+		_, err = dborm.XormUpdateTraceData(id, traceData)
+		if err != nil {
+			log.Errorf("Faile to XormUpdateTraceData:", err)
+			services.ResponseInternalServerError500ProcessError(w, err)
+			return
+		}
 	}
-	traceData.DecMsg = pathFile
-	_, err = dborm.XormUpdateTraceData(id, traceData)
-	if err != nil {
-		log.Errorf("Faile to XormUpdateTraceData:", err)
-		services.ResponseInternalServerError500ProcessError(w, err)
-		return
-	}
-
 	services.ResponseHtmlContent(w, http.StatusOK, pathFile)
 }