ReferenceError: OptionsOnSec is not defined

Dear All,

I use Python to call Acrobat JavaScript to convert PDF to EXCEL. The code is like following:

        aApp = win32.Dispatch('AcroExch.App')  
        pdDoc = win32.Dispatch('AcroExch.PDDoc')  
        if pdDoc.Open(r + "\\" + e):  
            jsObject = pdDoc.GetJSObject()  
            jsObject.SaveAs(des + "\\" + e + ".xlsx", "com.adobe.acrobat.xlsx")  
            jsObject = None  
            pdDoc.Close()  
        pdDoc = None  
        aApp.Exit()  
        aApp = None  

I have converted 6000+ PDF successfully without any problem.

But recently when I reused this code to conver another 4000+ PDF, for about 600 PDF, there were errors: "ReferenceError: OptionsOnSec is not defined".  The other PDF are converted successfully without any problem.

I have searched google for this key word "OptionsOnSec" but only found "2 results (0.38 seconds) " and none of them are helpful.  So I think maybe internal forum will be helpful.

Could anyone provide me with any advice?

Thank you so much for your help!