diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 4a612a2..2daad08 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,8 @@
+Quisk Version 4.2.50  December 2025
+===================================
+This is a quick fix for a bug in 4.2.49 that results in the repeated message
+AttributeError: 'Hardware' object has no attribute 'is_HermesLite2'
+
 Quisk Version 4.2.49  December 2025
 ===================================
 This version adds more features for the Anan 10E and other OpenHPSDR radios. Please test.
diff --git a/__init__.py b/__init__.py
index acd7eee..6aa31f5 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,2 +1,2 @@
-#Quisk version 4.2.49
+#Quisk version 4.2.50
 from .quisk import main
diff --git a/docs.html b/docs.html
index 50a5657..4e3f2bb 100644
--- a/docs.html
+++ b/docs.html
@@ -377,12 +377,13 @@ python3 quisk.py
 <br>
 <p>
 If "make" fails, you probably have missing packages or missing "-dev" packages. Try to figure out what is missing from the error messages.
-You only clone github for the initial installation. To update Quisk, use pull:
+You only clone github for the initial installation. To update Quisk, use pull followed by make:
 </p>
 <br>
 <pre>
 cd ~/quisk
 git pull
+make
 </pre>
 <br>
 <p>
diff --git a/quisk.py b/quisk.py
index 948cd6d..623d650 100644
--- a/quisk.py
+++ b/quisk.py
@@ -4275,6 +4275,10 @@ class App(wx.App):
     self.main_frame.SetClientSize(wx.Size(width, self.height))
     if hasattr(Hardware, 'pre_open'):       # pre_open() is called before open()
       Hardware.pre_open()
+    try:
+      self.is_HermesLite2 = Hardware.is_HermesLite2	# This is set in pre_open()
+    except:
+      self.is_HermesLite2 = False
     if self.local_conf.GetWidgets(self, Hardware, conf, frame, gbs, vertBox):
       pass
     elif conf.quisk_widgets:
@@ -6799,7 +6803,7 @@ class App(wx.App):
     if self.timer - self.heart_time0 > 0.10:	# call hardware to perform background tasks:
       self.heart_time0 = self.timer
       Hardware.HeartBeat()
-      if Hardware.is_HermesLite2:
+      if self.is_HermesLite2:
         self.tx_inhibit = QS.get_params('quisk_tx_inhibit')
       else:
         self.tx_inhibit = 0
diff --git a/setup.py b/setup.py
index d7e310c..f3ab525 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ import os
 # You must define the version here.  A title string including
 # the version will be written to __init__.py and read by quisk.py.
 
-Version = '4.2.49'
+Version = '4.2.50'
 
 fp = open("__init__.py", "w")	# write title string
 fp.write("#Quisk version %s\n" % Version)