Just noticed that I get a similar error about object 'kronecker' in 
"Matrix" package when trying to load "lme4".   So this is a more pervasive 
problem. 

Brian

Brian S. Cade, PhD

U. S. Geological Survey
Fort Collins Science Center
2150 Centre Ave., Bldg. C
Fort Collins, CO  80526-8818

email:  brian_cade@usgs.gov
tel:  970 226-9326
----- Forwarded by Brian S Cade/BRD/USGS/DOI on 11/30/2012 02:07 PM -----

From:
Brian S Cade/BRD/USGS/DOI
To:
R-help@r-project.org
Date:
11/30/2012 01:16 PM
Subject:
quantreg installation and conflicts with R 2.15.2


I recently lost the partitions on my hard drive (second time in 6 months) 
so I had to have our IT folks image all my files over to a new drive.  I 
completely reinstalled R (now 2.15.2) and all my libraries to my computer 
(Dell Latitude running Windows 7).  A few of my previous workspaces 
(created with R 2.14.1) can't be restored, reporting an error similar to 
the one I get when I try to load "quantreg" package which requires 
"SparseM" (see below).   So, not only will "quantreg" not load but some of 
my workspaces can't be restored when being loaded (see below).  Not sure 
about what this is about.   I asked Roger Koenker, the package maintainer, 
but he is on travel and won't have chance to seriously investigate this 
for awhile.  So I thought I would put it out to the R community and see if 
anyone has any suggestions about why this conflict might be occurring.

> library(quantreg)
Loading required package: SparseM
Error : object ?kronecker? is not exported by 'namespace:methods'
Error: package ?SparseM? could not be loaded

or 

Error: object ?kronecker? is not exported by 'namespace:methods'
During startup - Warning message:
unable to restore saved data in C:\CADESTUFF\DATA\BarryNoon\.RData 
>

Brian

Brian S. Cade, PhD

U. S. Geological Survey
Fort Collins Science Center
2150 Centre Ave., Bldg. C
Fort Collins, CO  80526-8818

email:  brian_cade@usgs.gov
tel:  970 226-9326

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