Update app.py

app.py

@@ -84,15 +84,16 @@ qa_pipeline = pipeline("text2text-generation", model="google/flan-t5-base")
 def document_qna_tool(pdf_path: str, question: str) -> str:
     """
     A tool for answering questions based on the content of a PDF document.
-
     Args:
         pdf_path (str): Path to the local PDF file.
         question (str): A natural language question to ask about the PDF content.
-
     Returns:
         str: Answer to the question based on the PDF's content.
     """
     try:
+        if not os.path.exists(pdf_path):
+            return f"Error: File not found at {pdf_path}"
+
         # Step 1: Extract text from PDF
         doc = fitz.open(pdf_path)
         text_chunks = []
@@ -118,8 +119,7 @@ def document_qna_tool(pdf_path: str, question: str) -> str:
         return f"Answer: {answer.strip()}"
 
     except Exception as e:
-        return f"Error processing document QnA: {str(e)}"
-
+        return f"Error processing document QnA: {type(e).__name__}: {str(e)}\n{traceback.format_exc()}"
 
 # -------------------- Other Components --------------------
 final_answer = FinalAnswerTool()