diff --git a/src/workflow/CommandExecutor.py b/src/workflow/CommandExecutor.py
index 6cc493014..7df0fdcbf 100644
--- a/src/workflow/CommandExecutor.py
+++ b/src/workflow/CommandExecutor.py
@@ -9,6 +9,7 @@
 import sys
 import importlib.util
 import json
+from random import randint
 
 class CommandExecutor:
     """
@@ -22,8 +23,12 @@ class CommandExecutor:
     # Methods for running commands and logging
     def __init__(self, workflow_dir: Path, logger: Logger, parameter_manager: ParameterManager):
         self.pid_dir = Path(workflow_dir, "pids")
+        self.execution_pids = []
         self.logger = logger
         self.parameter_manager = parameter_manager
+        self.states = {
+            "is_executing_error_occurred": False,
+        }
 
     def run_multiple_commands(
         self, commands: list[str]
@@ -42,6 +47,9 @@ def run_multiple_commands(
         # Log the start of command execution
         self.logger.log(f"Running {len(commands)} commands in parallel...", 1)
         start_time = time.time()
+        
+        # make sure is_executing_error_occurred is reset to False
+        self.states["is_executing_error_occurred"] = False
 
         # Initialize a list to keep track of threads
         threads = []
@@ -55,6 +63,11 @@ def run_multiple_commands(
         # Wait for all threads to complete
         for thread in threads:
             thread.join()
+        
+        # Check if any error occurred during execution and raise error so that no more commands are executed
+        if self.states["is_executing_error_occurred"]:
+            self.logger.log("❌ Stopping the execution as error occurred.")
+            raise Exception("Execution error occurred in one of the commands.")
 
         # Calculate and log the total execution time
         end_time = time.time()
@@ -73,29 +86,37 @@ def run_command(self, command: list[str]) -> None:
         # Ensure all command parts are strings
         command = [str(c) for c in command]
 
-        # Log the execution start
-        self.logger.log(f"Running command:\n"+' '.join(command)+"\nWaiting for command to finish...", 1)   
-        start_time = time.time()
-        
         # Execute the command
         process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         child_pid = process.pid
         
+        # Log the execution start
+        self.logger.log(f"Running command:{child_pid} "+' '.join(command)+"\nWaiting for command to finish...", 1)   
+        start_time = time.time()
+        
         # Record the PID to keep track of running processes associated with this workspace/workflow
         # User can close the Streamlit app and return to a running workflow later
         pid_file_path = self.pid_dir / str(child_pid)
         pid_file_path.touch()
+        self.execution_pids.append(str(child_pid))
         
         # Wait for command completion and capture output
         stdout, stderr = process.communicate()
         
         # Cleanup PID file
         pid_file_path.unlink()
+        if str(child_pid) in self.execution_pids:
+            self.execution_pids.remove(str(child_pid))
 
+        # Check if the process is killed
+        if self.states["is_executing_error_occurred"]:
+            self.logger.log(f"❌ Process {child_pid}: stopped the executing as in other thread error occurred")
+            return
+        
         end_time = time.time()
         execution_time = end_time - start_time
         # Format the logging prefix
-        self.logger.log(f"Process finished:\n"+' '.join(command)+f"\nTotal time to run command: {execution_time:.2f} seconds", 1)
+        # self.logger.log(f"Process finished:{child_pid} "+' '.join(command)+f"\nTotal time to run command: {execution_time:.2f} seconds", 1)
         
         # Log stdout if present
         if stdout:
@@ -103,8 +124,12 @@ def run_command(self, command: list[str]) -> None:
         
         # Log stderr and raise an exception if errors occurred
         if stderr or process.returncode != 0:
+            self.states["is_executing_error_occurred"] = True
             error_message = stderr.decode().strip()
-            self.logger.log(f"ERRORS OCCURRED:\n{error_message}", 2)
+            self.logger.log(f"❌ ERRORS OCCURRED:{child_pid} | {error_message}", 2)
+            self.stop()
+        else:
+            self.logger.log(f"✅ Command finished successfully: {child_pid} ")
 
     def run_topp(self, tool: str, input_output: dict, custom_params: dict = {}) -> None:
         """
@@ -190,6 +215,12 @@ def run_topp(self, tool: str, input_output: dict, custom_params: dict = {}) -> N
         if len(commands) == 1:
             self.run_command(commands[0])
         elif len(commands) > 1:
+            # commands = [
+            #     ["ping", "127.0.0.1", "-n", "10"],
+            #     ["ping", "127.0.0.1", "-n", "10"],
+            #     ["ping", "127.0.0.1", "-n", "15"],
+            #     ["python", "-c", "import time; time.sleep(3); raise Exception('Simulated Error')"]
+            # ]
             self.run_multiple_commands(commands)
         else:
             raise Exception("No commands to execute.")
@@ -198,14 +229,19 @@ def stop(self) -> None:
         """
         Terminates all processes initiated by this executor by killing them based on stored PIDs.
         """
-        self.logger.log("Stopping all running processes...")
-        pids = [Path(f).stem for f in self.pid_dir.iterdir()]
+        stop_id = randint(0, 1000000)
+        # self.logger.log(f"Stopping-{stop_id} all running processes...")
+        # pids = [Path(f).stem for f in self.pid_dir.iterdir()]
+        pids = self.execution_pids[:]
+        self.logger.log(f"🛑 Stopping-{stop_id} all running processes: {pids}")
         
         for pid in pids:
+            self.logger.log(f"Stopping-{stop_id} process {pid}")
             try:
                 os.kill(int(pid), 9)
+                self.logger.log(f"Stopping-{stop_id} successfully killed process {pid}")
             except OSError as e:
-                self.logger.log(f"Failed to kill process {pid}: {e}")
+                self.logger.log(f"Failed-{stop_id} to kill process {pid}: {e}")
         
         shutil.rmtree(self.pid_dir, ignore_errors=True)
         self.logger.log("Workflow stopped.")