diff --git a/gui/main.js b/gui/main.js
index 8fd9524d..3732ee91 100644
--- a/gui/main.js
+++ b/gui/main.js
@@ -873,12 +873,16 @@ ipcMain.on('request-check-rigctld',(event, data)=>{
         rigctld.on('error', function() {
 
             Data["state"] = "unknown/stopped - (" + data.ip + ":" + data.port + ")";
-            win.webContents.send('action-check-rigctld', Data);
+            if (win !== null && win !== ''){
+                win.webContents.send('action-check-rigctld', Data);
+            }
         })
 
         rigctld.on('connect', function() {
             Data["state"] = "connection possible - (" + data.ip + ":" + data.port + ")";
-            win.webContents.send('action-check-rigctld', Data);
+            if (win !== null && win !== ''){
+                win.webContents.send('action-check-rigctld', Data);
+            }
         })
 
     } catch(e) {
diff --git a/gui/package.json b/gui/package.json
index 9c783be6..3e345a0e 100644
--- a/gui/package.json
+++ b/gui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "FreeDATA",
-  "version": "0.6.4-alpha.1",
+  "version": "0.6.4-alpha.2",
   "description": "FreeDATA ",
   "main": "main.js",
   "scripts": {
diff --git a/tnc/static.py b/tnc/static.py
index 7999e34e..8694bf57 100644
--- a/tnc/static.py
+++ b/tnc/static.py
@@ -11,7 +11,7 @@ Not nice, suggestions are appreciated :-)
 import subprocess
 from enum import Enum
 
-VERSION = "0.6.4-alpha.1"
+VERSION = "0.6.4-alpha.2"
 
 ENABLE_EXPLORER = False