[R] "locked environment"

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From: Heywood, Giles (Giles.Heywood@CommerzbankIB.com)
Date: Wed 21 May 2003 - 20:40:55 EST 

Message-id: <8CBAA121CEB4D5118CB200508BB2BBEF540344@xmx8lonib.lonib.commerzbank.com>

I have a class defined as an extension to matrix:
fooCLASS <- setClass("foo",representation("matrix"))

and define a method for a generic function (no problem):
setMethod("diff",signature(x="foo"),diff.foo <- function(x){x})

but I get a different behaviour for another generic function:
setMethod("lag",signature(x="foo"),lag.foo <- function(x){x})

Error in assign(".packageName", pkg, env) :
can't add bindings to a locked environment

I did not get this behaviour under 1.5.1, it ran fine - any pointers?

platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 1
minor 7.0
year 2003
month 04
day 16
language R

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