Hi Costas, I have the same problem. I guess is because a problem with Time
Zones in Windows. I am from Buenos Aires/Argentina and I already tried ART,
Buenos_Aires and Argentina and the problem is still there. I only need daily
values thus I tried Sys.setenv(TZ="GMT") and it worked. Probably you can
check it until someone give a better solution, or you can go back to an
older version of R (or migrate to a different OS).

Regards,

Daniel Merino

> library(quantmod)
Loading required package: Defaults
Loading required package: xts
Loading required package: zoo
Loading required package: TTR
> getSymbols("GS10",src="FRED")
Error in as.POSIXlt.character(x, tz, ...) :
  character string is not in a standard unambiguous format
>  sessionInfo()
R version 2.13.0 (2011-04-13)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United
States.1252    LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                           LC_TIME=English_United
States.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] quantmod_0.3-16 TTR_0.20-2      xts_0.8-0       zoo_1.6-5
Defaults_1.1-1

loaded via a namespace (and not attached):
[1] grid_2.13.0     lattice_0.19-26

Change in the time zone:

Sys.setenv(TZ="GMT")
getSymbols("GS10",src="FRED")
[1] "GS10"


2011/5/1 Arun.stat <arun.kumar.saha@gmail.com>

> Hi Costas, it is working fine in my system. May be you should try with the
> latest version?
>
>
> > library(quantmod)
> Loading required package: Defaults
> Loading required package: xts
> Loading required package: zoo
> Loading required package: TTR
> > getSymbols("GS10",src="FRED")
> [1] "GS10"
> > sessionInfo()
> R version 2.13.0 (2011-04-13)
> Platform: i386-pc-mingw32/i386 (32-bit)
>
> locale:
> [1] LC_COLLATE=English_India.1252  LC_CTYPE=English_India.1252
> LC_MONETARY=English_India.1252 LC_NUMERIC=C
> [5] LC_TIME=English_India.1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] quantmod_0.3-16 TTR_0.20-3      xts_0.8-0       zoo_1.6-5
> Defaults_1.1-1
>
> loaded via a namespace (and not attached):
> [1] grid_2.13.0     lattice_0.19-23
>
> Thanks and regards,
> _____________________________________________________
>
> Arun Kumar Saha, FRM
> QUANTITATIVE RISK AND HEDGE CONSULTING SPECIALIST
> Visit me at: http://in.linkedin.com/in/ArunFRM
> _____________________________________________________--
> View this message in context:
> http://r.789695.n4.nabble.com/FRED-prob-tp3486372p3487735.html
> Sent from the Rmetrics mailing list archive at Nabble.com.
>
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>



-- 
Daniel

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