diff --git a/jobrunner/__meta__.py b/jobrunner/__meta__.py
index ef683e1..1c9c0b7 100644
--- a/jobrunner/__meta__.py
+++ b/jobrunner/__meta__.py
@@ -1,7 +1,7 @@
 """Metadata for jobrunner"""
 
 __pkgname__ = "PyJobRunner"
-__version__ = "2023.11.3"
+__version__ = "2023.11.4"
 __authors__ = "Akash Dhruv"
 __license__ = "Apache Software License"
 __copyright__ = "Copyright (c) Akash Dhruv 2023. All Rights Reserved."
diff --git a/jobrunner/instruments/flashx.py b/jobrunner/instruments/flashx.py
index c130651..0ffb57b 100644
--- a/jobrunner/instruments/flashx.py
+++ b/jobrunner/instruments/flashx.py
@@ -18,6 +18,10 @@ def CreateParfile(workdir):
     # reserved environment variable for
     input_dict = toml.load(workdir + os.sep + "job.input")
 
+    # Create an empty list to track keys that are being
+    # entered into the parfile
+    key_list = []
+
     # Open flash.par in write mode in JobWorkDir, reserved environment
     # variable for working node along the directory tree.
     with open(workdir + os.sep + "flash.par", "w") as parfile:
@@ -49,6 +53,13 @@ def CreateParfile(workdir):
                         + "during Flash-X parfile generation"
                     )
 
+                elif key in key_list:
+                    raise ValueError(
+                        f'[jobrunner] parameter "{key}" associated with "{group}" is already '
+                        + "entered into the parfile using a different group. Please fix your toml "
+                        + "files along the directory tree."
+                    )
+
                 else:
                     # Deal with True/False values
                     if isinstance(value, bool):
@@ -62,6 +73,8 @@ def CreateParfile(workdir):
                     else:
                         parfile.write(f"{key} = {value}\n")
 
+                    key_list.append(key)
+
 
 def CreateHeater(workdir):
     """
diff --git a/jobrunner/lib/_filetools.py b/jobrunner/lib/_filetools.py
index e96d563..ca44413 100644
--- a/jobrunner/lib/_filetools.py
+++ b/jobrunner/lib/_filetools.py
@@ -80,6 +80,7 @@ def CreateInputFile(config):
                     job_toml[group].update(node_toml[group])
                 else:
                     job_toml[group] = node_toml[group]
+
         # start writing the job.input file
         with open(config.job.workdir + os.sep + "job.input", "w") as inputfile: