[BioC] Error message with ReadAffy

[Dasgupta, Abhijit (NIH/NCI)]

 Why doesn't affy, if it encounters a cel file from a HG-U133A chip, search
first in the affydata library (or try to download it)for the CDF file
instead of giving the error message Xuejun got (and I got earlier). I guess
my question is, why do we have to manually load the affydata library? This
is a point I didn't find in any of the affy vignettes, though if I missed it
I'm sorry.

Abhijit Dasgupta
Division of Cancer Epidemiology and Genetics
National Cancer Institute

-----Original Message-----
From: Xuejun Peng
To: bioconductor at stat.math.ethz.ch
Sent: 10/17/2003 3:00 PM
Subject: [BioC] Error message with ReadAffy

I'm running Bioconductor release 1.2 with R 1.7.1 in a Windows 2000 
environment. I encoutered the following problem when I try to read affy 
data. Can anyone help?
(I did not have this problem with older versions.)

Thanks.

Peng

*************************************************
 ReadAffy("NAWM17_10_4A.cel")
Environment hgu133acdf is not available.
This environment contains needed probe location information.
We will try to download and install the hgu133acdf package.

Note: No specified download type, defaulting to Win32
[1] "Attempting to download hgu133acdf from BIOCcdf/"
Error in download.file(fileURL, destFile, mode = "wb", quiet = TRUE, 
method = method) :
        unsupported URL scheme
Error in inherits(cdf.env, "try-error") : Object "cdf.env" not found

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