diff --git a/base_telegram_inference_bot.py b/base_telegram_inference_bot.py
index 2033474..a9b7b52 100644
--- a/base_telegram_inference_bot.py
+++ b/base_telegram_inference_bot.py
@@ -14,8 +14,12 @@ class BaseTelegramInferenceBot(ABC):
 
     @staticmethod
     def load_system_prompt():
-        with open(os.environ.get("SYSTEM_PROMPT_PATH"), "r", encoding="utf-8") as file:
-            return file.read().strip()
+        system_prompt_path = os.getenv("SYSTEM_PROMPT_PATH")
+        if system_prompt_path and os.path.isfile(system_prompt_path):
+            with open(system_prompt_path, "r", encoding="utf-8") as file:
+                return file.read().strip()
+        else:
+            raise FileNotFoundError("SYSTEM_PROMPT_PATH is not set or file does not exist.")
 
     @staticmethod
     def load_functions():
@@ -52,7 +56,7 @@ class BaseTelegramInferenceBot(ABC):
 
     def call_tool(self, function_call_name, function_call_arguments):
         function_name = function_call_name
-        function_args = json.loads(function_call_arguments if function_call_arguments is not None else "{}")
+        function_args = json.loads(function_call_arguments if function_call_arguments is not None else "{}").
         for tool in self.tools:
             if function_name in [f["name"] for f in tool.get_functions()]:
                 return tool.execute(function_name, **function_args)
diff --git a/browse_command.py b/browse_command.py
index b77e5f9..7be5a78 100644
--- a/browse_command.py
+++ b/browse_command.py
@@ -40,6 +40,11 @@ async def button_callback(update: Update, context: ContextTypes.DEFAULT_TYPE) ->
         subdir = data.split(":")[1]
         await query.edit_message_text(f"Navigating to [{subdir}] is not yet implemented.")
     elif data.startswith("file:"):
-        # Handle file selection (for future implementation)
+        # Handle file selection
         file = data.split(":")[1]
-        await query.edit_message_text(f"Viewing contents of {file} is not yet implemented.")
\ No newline at end of file
+        file_path = os.path.join('prompts', file)
+        os.environ['SYSTEM_PROMPT_PATH'] = file_path
+        await query.edit_message_text(f"Selected: {file}. SYSTEM_PROMPT_PATH updated.")
+
+        # Optionally, you may want to reload the system prompt here if needed.
+        # bot.system_prompt = bot.load_system_prompt()  # Uncomment if you have access to the bot instance.
\ No newline at end of file