[BioC] Unknown cdf error while processing affy files

[Tapan Mehta]

Hello,

I am trying to run the mas5 and rma methods of affy
package on some data of affymetrix. It is supposed to
be scanned from a new scanner. However I am getting
this error where it complains about unknown cdf or cdf
not existing in the repository . I am running on an
older version of R ( R1.7) and bioconductor version of
1.2. Please could anybody guide me in getting around
this problem.

Thanks,

Tapan Mehta