Why is Doc.closeDoc causing memory reference error?

Question

My script worked fine when I tested it with Adobe Pro.  It is only in Adobe Reader X that it crashes and closes the app.
In LiveCycle ES version 8.2, I added JavaScript to do the following in the preSubmit event of a hidden Submit button:
var currentDoc = event.target;
var path = currentDoc.path;
execMenuItem("SaveAs",currentDoc);
var newPath = currentDoc.path;
if (path != newPath){
     //re-open the original document (blank form)
     app.openDoc({cPath:path});
//stop the submit event
xfa.event.cancelAction = true;
//close the current document (completed form)
if (currentDoc.disclosed = true){
   currentDoc.closeDoc();
From the JavaScript API documentation, I learned that the document has to have the disclosed property set to true to be available to other open documents.  I am doing this by calling a document-level function in the form1.docReady event, which I have verified is running when the document opens.  The original document is being opened, the saved document is being closed, but when the "Submit Cancelled" dialog box appears and I click "OK", I get this error:
The instruction at "0xsomething" references memory at "0x00000010".  The instruction could not be "read".
And whether I hit "Cancel" or "OK", the reader closes.  If I comment out the cancelAction, the same thing happens, only without the Submit Cancelled dialog.  So it must be the Doc.closeDoc that is doing it.  I have also tried putting the code in the postSubmit and setting a timeout, but in those cases the close never happened at all. 

Answer 1

Yes, I have read the JavaScript API.  That is how I found out about the "disclosed" property.  If it were a security or permissions issue, I normally find those while debugging in Acrobat Pro, in the JavaScript console.
I know there are some things you can't do in Reader that you can do in Pro, but it doesn't make sense to me that closing a document should be one of them.   If so, why even have the closeDoc method?
It seems like the document is closing before some other task can finish.  I also tried setting a timeout on it, but then it doesn't close at all. 
app.setTimeOut(currentDoc.closeDoc(),5000);
One reason we have to close these documents is that after calling xfa.event.cancelAction = true, none of the select boxes or buttons work anymore.  It is unclear where to set this back to "false".  I tried setting it in the preOpen events of the select lists, but it had no effect.  It can only be called in preSubmit, preOpen, preSign, preSave.  So, I decided it would be better just to close the document.  When they reopen it, everything works again.