[BioC] problem with expresso(...normalize.method="vsn")

[Stefano Calza]

Hi.

I want to use expresso to apply RMA  with VSN normalization. I use the following code:

expresso(dati,normalize.method="vsn",bgcorrect.method="rma",pmcorrect.method="pmonly",summary.method="medianpolish")

Every is fine but when I get to 

...
...
normalizing...vsn: [skipped]: Error: L-BFGS-B needs finite values of fn

What's wrong?

TIA,
Stefano