because that script is for 6.1 
in Pharo 7 you do not need to update Iceberg (in fact, you do not need it in Pharo 6.1 either, this was for Pharo 6.0, when Iceberg was 0.4)

please, take the instructions from Guille���s place as your guide: 

https://github.com/guillep/PharoIntegrationProcess/wiki/Contribute-a-fix-to-Pharo

the only difference is that before creating your branch you need to do a fetch from origin/developent (I didn���t submit the change because I don���t know how to fork the wiki :P),

cheers, 
Esteban

On 28 Sep 2017, at 04:45, Sean P. DeNigris <sean@clipperadams.com> wrote:

I wanted to make a fix to Iceberg. I downloaded a fresh Pharo 7.0 image via
Launcher, and pasted the Iceberg updating script from the GH readme [1]:
   #('Iceberg-UI' 'Iceberg-Plugin-GitHub' 'Iceberg-Plugin'
'Iceberg-Metacello-Integration' 'Iceberg-Libgit'
   'Iceberg' 'BaselineOfIceberg' 'LibGit-Core' 'BaselineOfLibGit')
       do: [ :each | each asPackage removeFromSystem ].

   Metacello new
     baseline: 'Iceberg';
     repository: 'github://pharo-vcs/iceberg';
     load.

I got "Instance of AnObsoleteIceMetacelloRepositoryAdapter did not
understand #isValid"

1. https://github.com/seandenigris/iceberg



-----
Cheers,
Sean
--
Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html