I report new clues to lock-up of Mac R-GUI:

  Model Name:MacBook Pro
  Model Identifier:MacBookPro10,1
  Processor Name:Intel Core i7
  Processor Speed:2.7 GHz
  Number of Processors:1
  Total Number of Cores:4
  L2 Cache (per Core):256 KB
  L3 Cache:6 MB
  Memory:16 GB
  Boot ROM Version:MBP101.00EE.B0A
  SMC Version (system):2.3f36
  Serial Number (system):C02KP40GFFT1
  Hardware UUID:1C991826-2C15-5AF1-8C81-1F69F51034A1

R for Mac OS X GUI 1.67-devel Mavericks build

R for Mac OS X GUI written by:
Simon Urbanek
Hans-Jörg Bibiko
Stefano M. Iacus

I installed R in my MacBook Pro (Retina, 15-inch, Early 2013).  I have been 
using R since mid 2000s and started using the OS X GUI fairly early in my R 
experience and value its organization of my R use.

About a year ago I started having interuptions in my R-GUI use where it locks 
up.  All of several past interactions on the R-SIG-MAC so far have not 
eliminated this locking up.  In the latest go-around it was terminated with the 
idea that it was related to my use of large data sets and long calculations 
particularly ones that also used the rgl library.

As part of the drama of R Mac OS X GUI locking up, which has not been resolved 
for me yet, I now discovered new clues in the past month during which I have 
not used rgl.

1) When I boot R-GUI anew  the File/Open Recent has no entries.
    … if I do a carriage-return at the R prompt the File/Open Recent list is 
populated.
2) The history for the active workspace has not been working for me.  It only 
loads the history that was collected in some earlier work directory. It does 
not save the current history in either an older directory or the (currently set 
in R/Preferences/General/Startup/Directory[x]Always_apply) current work 
directory .
3) When I try to save the current history using the > savehistory(file = 
".Rhistory”) or simply  > savehistory() … I get the following message:

######

 > savehistory(file = ".Rhistory”)
Error in .External2(C_savehistory, file) :
  'savehistory' is not currently implemented

#####

I have only made changes to R operation through R-GUI Preferences.  Is there 
something going wrong with the history functions in the GUI?

Work is slowed by lack of a useful history and continued need to reboot R in a 
complicated way each time the GUI locks up.

When I run R in a terminal at my home directory,  history works as advertised 
after I have done some work and q() with a save … then reboot R in terminal and 
use up-arrow to retrieve old R statements.

4) I reiterate the tedious procedure for rebooting after a lock-up of GUI 
typically with a few R-scripts open in editors:
 a) kill the R process ID
 b) reboot the R-GUI, which by default loads the previously open R-scripts.
 c) close those R-scripts and do not do any R-work.
 d) quit()
 e) reboot the R-GUI and close it immediately with another q() {otherwise go 
back to step ‘a’.}
 f) reboot the R-GUI and resume R-work {with no history … as usual} e.g. load a 
script into the editor, edit and run it.  But, avoid trying to load another 
R-script into the ediitor after having run the one script.
     … The scripts used are what I would call regular scripts accessing 
relatively small data sets and plotting results and _not_ using the difficult 
rgl library.

I am not sure how many other users are experiencing the same symptoms.

Joe

-·.  .· ·.  .><((((º>·.  .· ·.  .><((((º>·.  .· ·.  .><((((º> .··.· >=-       
=º}}}}}><
Joseph G. Kunkel, Research Professor
112A Marine Science Center
University of New England
Biddeford ME 04005
http://www.bio.umass.edu/biology/kunkel/

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