Issue with PLYR.
Now using R 2.14 and this data and plyr command line worked with 2.13
I am also loading the same saved data that worked previously, but now 
some issue.

 > library(plyr)
 > UNESCO <- dget('C:/Carbon-GJ/BZE_ecosys.robj')
 > df2 <- ddply(df, "UNESCO", summarise, total_ha = sum(Ha))
*Error in if (empty(.data)) return(.data) :
   missing value where TRUE/FALSE needed*

Clueless

Ideas suggestions?
Some change in PLYR?

Bruce


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