title: Writing to an existing Excel Workbook using xlwings
body: <p>I am new to Python and working on a project that I could use some help on.  So I am trying to modify an existing excel workbook in order to compare stock data.  Luckily, there was a program online that retrieved all the data I need and I have successful been able to pull the data and write the data into a new excel file.  However, the goal is to pull the data and put it into an existing excel file.  Furthermore, I need to overwrite the cell values in the existing file.  I believe xlwings is able to do this and I think my code is on the write track, but I ran into an unexpected error.  The error I get is:</p>
  
  <pre><code>com_error: (-2147023174, 'The RPC server is unavailable.', None, None)  
  </code></pre>
  
  <p>I was wondering if anyone knew why this error came up?  Also, does anyone know how to fix it?  Is it fixable?  Is my code wrong? Any help or guidance is appreciated.  Thank you.</p>
  
  <pre><code>import good_morning as gm
  import pandas as pd
  import xlwings as xw
  
  #import income statement, balance sheet, and cash flow of AAPL
  fd = gm.FinancialsDownloader()
  fd_frames = fd.download('AAPL')
  
  #Creates a DataFrame for only the balance sheet
  df1 = pd.DataFrame(list(fd_frames.values())[0])
  
  #connects to workbook I want to modify
  wb = xw.Book(r'C:/Users/vince/OneDrive/Documents/Python/Project/spreadsheet.xlsm')
  
  #sheet I would like to modify
  sht = wb.sheets[1]
  
  #modifies &amp; overwrites values in my spreadsheet
  sht.range('M6').value = df1 
  </code></pre>