From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: Using tramp to run R source code blocks on remote server
Date: Thu, 21 Apr 2016 15:04:49 -0700
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To: Vikas Rawal <vikaslists@agrarianresearch.org>
Cc: org-mode mailing list <emacs-orgmode@gnu.org>

On Thu, 21 Apr 2016, Charles C. Berry wrote:

> On Thu, 21 Apr 2016, Charles C. Berry wrote:
>
>> On Thu, 21 Apr 2016, Vikas Rawal wrote:
>> 
>>> I am trying to run R source code blocks on a remote server (defined in my 
>>> ~/.ssh/config as cesp).
>>> 
>>> I am facing several problems.
>>> 
>>> 1.  The following sample block, when used with ":results value" does not 
>>> give any results.
>>> 
>>> #+NAME: level1
>>> #+begin_src R :results value :exports results :colnames yes :hline yes 
>>> :session cesp :dir /cesp:/home/vikas/
>>> c(1:5)
>>> #+end_src
>>> 
>>> I get the following message:
>>> 
>>> tramp-flush-directory-property: Wrong type argument: arrayp, nil
>>> 
>> 
>> I think this is an issue with having different version of ESS on your local 
>> and remote systems.
>> 
>
> OOPS!
>
> The `different versions' issue affected my setup. But after correcting it, I 
> still get the error you cited above.
>
> Not sure exactly where the fault lies.
>


Maybe in `org-babel-comint-eval-invisibly-and-wait-for-file', but I am not 
sure what/how.

I tried to instrument the function (C-u C-M-x on the function source) and 
run it. And it ran without error when I stepped thru it. Then I removed 
instrumentation with C-M-x and reran - again no error.

I tried removing the *.elc and restarting emacs, but that seems to make no 
difference - the error is still there till I instrument the code.

Until this is sorted out, you might try the instrument/uninstrument gambit 
as a workaround.

HTH,

Chuck