[Python][Adobe Acrobat] Save PDF as Excel problem

I am working on converting PDF to Excel by adobe acrobat Pro and Python. Recently, the program can open adobe acrobat but it can save the pdf as excel file. Acrobat pop up an error message

The specified file could not be written to. It may be in use.

I have no idea what is problem.

import win32com.client, win32com.client.makepy, os, winerror, pandas as pd, errno, re
from win32com.client.dynamic import ERRORS_BAD_CONTEXT

class Acrobat_scan_automation:
    def __init__(self):
        self.directory_path = r'D:DesktopDesktop_21.Python_projectACROBAT_SCAN_AUTOMATION'
        os.chdir(self.directory_path)
        self.folder_name = {
            "output": r'output',
            "source": r'source',
            }
        self.excel_file = r'output.xlsx'
        self.output_csv = r'output_1.csv'
        self.pdf_file = r'arabic.pdf'
        return

    def pdf2excel(self,pdf_file,excel_file):
        try:
            ERRORS_BAD_CONTEXT.append(winerror.E_NOTIMPL)
            src = os.path.abspath(os.path.join(self.folder_name['source'],pdf_file))
            print('[INFO] abspath=',src)
            win32com.client.makepy.GenerateFromTypeLibSpec('Acrobat')
            adobe = win32com.client.DispatchEx('AcroExch.App')
            avDoc = win32com.client.DispatchEx('AcroExch.AVDoc')
            print('[INFO] Open',src)
            avDoc.Open(src, src)
            pdDoc = avDoc.GetPDDoc()
            print('[INFO] pdDoc=',pdDoc)
            jsObject = pdDoc.GetJSObject()
            print('[INFO] jObject=',jsObject)
            export_file = os.path.abspath(os.path.join(self.folder_name['output'],excel_file))
            jsObject.SaveAs(export_file, 'com.adobe.acrobat.xlsx')   # < ---- Error

        except Exception as e:
            print(str(e))

        finally:        
            # avDoc.Close(True)
            jsObject = None
            pdDoc = None
            avDoc = None
            return

    def main(self):
        print('[INFO] Start using acrobat')
        self.pdf2excel(self.pdf_file, self.excel_file)
        return


if __name__ == '__main__':
    Program = Acrobat_scan_automation()
    Program.main()