On 04/18/2011 10:24 AM, Mariano Martinez Peck wrote:

On Mon, Apr 18, 2011 at 6:04 PM, sourav roy <sourav_pharo@in.com

<mailto:sourav_pharo@in.com>> wrote:

� �Hi
� �i tried the way to suggested but i am still getting the same error.
� �My pharo version is 1.1.1. do you think this may be the reason.
� �i am attaching a snapshot.


The problem is that the Pharo 1.1.1 already has Metacello installed. But
of course, the metacello of that moment.
The way you are installing OSProcess, i.e

((Smalltalk at: #ConfigurationOfOSProcess) project version: #stable) �load.

use the "symbolic" version #stable which is a Metacello feature that was
added to Metacello in a newer version than the one you have in Pharo
1.1.1. So...you have to options:

1) Try to upgrade your Metacello version of your Pharo 1.1.1 to the
latest one. This is what I tried, but failed. THere is a way to upgrade
a package in Metacello but I don't remember now. Maybe other guy now.

The following should upgrade to the correct version of Metacello:

�ConfigurationOfMetacello project updateProject.
�ConfigurationOfMetacello load.

If this fails, I am interested in a stack and an error report...

What did you try that failed?

2) browse the implementation of #stable and you will see it is :

stable: spec
<symbolicVersion: #'stable'>

� � spec for: #'common' version: '4.4.0'.

So...you can just evaluate:

((Smalltalk at: #ConfigurationOfOSProcess) project version: '4.4.0') �load.

and it should work.

Anyway, I recommend you to read the Metacello chapter I wrote with Stef:
https://gforge.inria.fr/frs/download.php/28462/Metacello.pdf

as you ca find it in http://pharobyexample.org/