Hi all,

Since I upgraded to R3.0.1 and also upgraded ffbase package, I got the following error
when using bySum( ) funciton in ffbase.

For example:

> library(ffbase)
> bySum(iris$Sepal.Length,iris$Species)

Error in bySum(iris$Sepal.Length, iris$Species) :
  REAL() can only be applied to a 'numeric', not a 'symbol'


Any idea ?

Steve Chen

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