Thanks Avi,
	I upgraded PackageInfo and everything went ok. 

Regards,
Hernán

> -----Original Message-----
> From: squeak-dev-bounces at lists.squeakfoundation.org
[mailto:squeak-dev-
> bounces at lists.squeakfoundation.org] On Behalf Of Avi Bryant
> Sent: Wednesday, April 21, 2004 3:43 PM
> To: The general-purpose Squeak developers list
> Subject: Re:
>
[BUG][Monticello]UndefinedObject(Object)>>doesNotUnderstand:#beginsWith:
> 
> 
> On Apr 21, 2004, at 6:48 AM, htylim at yahoo.com.ar wrote:
> 
> > In a fresh Squeak 3.7b 5878 image if I try to rename a class it
works
> > as
> > expected. Same fresh image, but after installing Monticello v150
from
> > SqueakMap if I try to rename a class I got this walkback.
> 
> There have been several fixes posted that would address this, I think.
> The easiest is probably for you to load the most recent PackageInfo
> from SqueakMap.
> 
> Avi