diff --git a/auto_rx/auto_rx.py b/auto_rx/auto_rx.py
index 3235a3e..f83cf22 100644
--- a/auto_rx/auto_rx.py
+++ b/auto_rx/auto_rx.py
@@ -820,8 +820,8 @@ def main():
     logging.getLogger("geventwebsocket").setLevel(logging.ERROR)
 
     # Check all the RS utilities exist.
-    logging.debug("Checking if utils exist")
-    if not check_rs_utils():
+    logging.debug("Checking if required binaries exist")
+    if not check_rs_utils(config):
         sys.exit(1)
 
     # Attempt to read in config file
@@ -834,6 +834,7 @@ def main():
         config = _temp_cfg
         autorx.sdr_list = config["sdr_settings"]
 
+
     # Apply any logging changes based on configuration file settings.
     if config["save_system_log"]:
         # Enable system logging.
diff --git a/auto_rx/autorx/__init__.py b/auto_rx/autorx/__init__.py
index d91039f..2fe6131 100644
--- a/auto_rx/autorx/__init__.py
+++ b/auto_rx/autorx/__init__.py
@@ -12,7 +12,7 @@ from queue import Queue
 # MINOR - New sonde type support, other fairly big changes that may result in telemetry or config file incompatability issus.
 # PATCH - Small changes, or minor feature additions.
 
-__version__ = "1.6.3-beta2"
+__version__ = "1.6.3-beta3"
 
 
 # Global Variables
diff --git a/auto_rx/autorx/utils.py b/auto_rx/autorx/utils.py
index 83ba65d..330d2ea 100644
--- a/auto_rx/autorx/utils.py
+++ b/auto_rx/autorx/utils.py
@@ -63,7 +63,7 @@ def timeout_cmd():
                 _timeout_cmd = "timeout -k 30 "
     return _timeout_cmd
 
-def check_rs_utils():
+def check_rs_utils(config):
     """ Check the required RS decoder binaries exist
         Currently we just check there is a file present - we don't check functionality.
     """
@@ -72,6 +72,7 @@ def check_rs_utils():
             logging.critical("Binary %s does not exist - did you run build.sh?" % _file)
             return False
         _ = timeout_cmd()
+
     return True
 
 
@@ -958,10 +959,16 @@ def rtlsdr_test(device_idx="0", rtl_sdr_path="rtl_sdr", retries=5):
             FNULL = open(os.devnull, "w")  # Inhibit stderr output
             _ret_code = subprocess.check_call(_rtl_cmd, shell=True, stderr=FNULL)
             FNULL.close()
-        except subprocess.CalledProcessError:
+        except subprocess.CalledProcessError as e:
             # This exception means the subprocess has returned an error code of one.
-            # This indicates either the RTLSDR doesn't exist, or
-            pass
+            # This indicates either the RTLSDR doesn't exist, or some other error.
+            if e.returncode == 127:
+                # 127 - File not found
+                logging.critical("rtl_sdr utilities (rtl_sdr, rtl_fm, rtl_power) not found!")
+                return False
+            else:
+                logging.warning(f"rtl_sdr test call resulted in return code of {e.returncode}.")
+                pass
         else:
             # rtl-sdr returned OK. We can return True now.
             time.sleep(1)