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Problem with RMySQL installation - R64.app 2.14, OS X

CIURANA EUGENE 
Greetings. 

I installed DBI and RMySQL under R 64-bit console
without issues, but after several attempts at installing it under
R64.app it continues to give this error message in response to
library(RMySQL): 

Loading required package: DBI
Error : .onLoad failed
in loadNamespace() for 'RMySQL', details:
 call: dyn.load(file, DLLpath
= DLLpath, ...)
 error: unable to load shared object
'/Users/ciurana/Library/R/2.14/library/RMySQL/libs/x86_64/RMySQL.so':

dlopen(/Users/ciurana/Library/R/2.14/library/RMySQL/libs/x86_64/RMySQL.so,
6): Library not loaded:
/Library/Frameworks/R.framework/Versions/2.13/Resources/lib/libR.dylib

Referenced from:
/Users/ciurana/Library/R/2.14/library/RMySQL/libs/x86_64/RMySQL.so

Reason: image not found
Error: package/namespace load failed for
'RMySQL' 

I tried installing from the command line using R CMD INSTALL
RMySQL-whatever.tgz 

I also tried setting up the environment variables
within R64.app for the MySQL client headers and libraries, then
installing using install.packages(). 

I tried installing this as a
normal user, and as root. Same effect in both cases. 

The net effect is
this error message ONLY under R64.app. R from the command line works
fine, and my scripts and interactive sessions can talk to the MySQL
databases just fine, sans errors or warnings. 

I was able to install
(and run) RMySQL under R64 both console and GUI app version 2.13. This
problem appeared only under 2.14.0. 

Can you please suggest a way of
troubleshooting this, or a good installation guide specific to OS X?
Google reports none; I'll be happy to write one too. 

Thanks in advance
and have a great week, 

E