[Rd] Problem with tuned Rblas from CRAN with R-2.4.0

Daniel Nordlund res90sx5 at verizon.net
Wed Dec 13 06:30:15 CET 2006

I encountered the following problem in R-2.4.0 for Windows binary downloaded from CRAN (data from R-help post by Ethan Johnsons).  I was also using the contributed binary Rblas.dll for Intel P4 chip.  The problem doesn't occur with the default Rblas.dll. 

x=c(3.05176E-05, 0.000457764, 0.003204346, 0.0138855, 0.04165649, 0.09164429, 0.1527405, 0.1963806, 0.1963806, 0.1527405, 0.09164429, 0.04165649, 0.0138855, 0.003204346, 0.000457764, 3.05176E-05)
y=c(0.0000306, 0.0004566, 0.0031985, 0.0139083, 0.0415539, 0.0917678, 0.1528134, 0.1962831, 0.1962994, 0.1527996, 0.0917336, 0.0415497, 0.0139308, 0.0031917, 0.0004529, 0.0000301)

I got the following popup window error message

   The procedure entry point zdrot_ could not be found in the dynamic link library Rblas.dll

After closing the popup, the following was printed in the console:

Error in chol2inv(Qr$qr[p1, p1, drop = FALSE]) : 
        lapack routines cannot be loaded
In addition: Warning message:
unable to load shared library 'C:\R\R-2.4.1beta/modules//lapack.dll':
  LoadLibrary failure:  The specified procedure could not be found.

I subsequently downloaded R-2.4.1beta from CRAN and had the same problem with the contributed binary Rblas.dll 

platform       i386-pc-mingw32                         
arch           i386                                    
os             mingw32                                 
system         i386, mingw32                           
status         beta                                    
major          2                                       
minor          4.1                                     
year           2006                                    
month          12                                      
day            07                                      
svn rev        40137                                   
language       R                                       
version.string R version 2.4.1 beta (2006-12-07 r40137)

OS:  WinXP Pro service pack 2

I haven't had any problems with the contributed binary up thru R-2.3.1.  I checked the changes file and saw that for R-2.4.0 the Rblas.dll would have to be recompiled, but also that the contributed binaries on CRAN had been updated.  However, I couldn’t find any Rblas binaries with a date after 2005.  Any suggestions on where to find an Rblas binary for WinXP and P4 chip, or do I need to try to compile one on my own?

Thanks for any assistance,


Daniel Nordlund
Bothell, WA  USA

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