social network bug! (PR#6729)

Have you read the FAQ?: R-bugs is for bugs, not help questions.

Full_Name: Yoon, hye sung
Version: 1.8.1
OS: window

^^^^^^
I have never heard of that OS!

Submission from: (NULL) (203.255.177.155)

library(sna)

Warning message: 
package sna was built under R version 1.9.0 

What's this message mean?

Probable user error, in exactly the way it says.  Which word do you not
understand?

*You* installed a version of the package sna built under a pre-release of
R 1.9.0.  Packages in R are not necessarily binary compatible with earlier
releases.  Where did you get this installation from?  The Windows (sic)  
version of package sna on CRAN was built under 1.8.0, unless you manually
got the builds for 1.9.x from the bin/windows/contrib/1.9 area on CRAN.

I suggest you remove the package sna and reinstall it as described in the 
rw-FAQ.

Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595