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Your rails 2.3.5 seems incomplete, for example activemodel 2.3.5 isn't installed. Make sure your rails 2.3.5 install is correct.

How can I do that?

I always get this:


root@absolutelytopsecretmachine:~# gem install -v=2.3.5 rails
Successfully installed rails-2.3.5
1 gem installed
Installing ri documentation for rails-2.3.5...
Installing RDoc documentation for rails-2.3.5...


how/where do I have to continue?

Mmh, maybe gem uninstall rails && gem install rails -v=2.3.5 would work, but that would remove gem 3.0 obviously. Anyway, I don't really know how you got to this state, and I remember debian doing stuff "their own way" with gems, so I don't really know what would help.

I followed your advice and executed your command (I don't need version 3 at the moment) but it didn't help.

Any other advice?

As I said, I can't help much more, there's something very wonky with your install, can't fathom what it is though.

Felix, just FYI: ActiveModel is an addition of Rails3. It defines the new public API used by OR implementations like ActiveRecord. Thus Rails3 can be used with interchangable OR-mappers.

Karlheiz: You should uninstall rack 1.2.1 (which might be required by Rails3 but is incompatible with Rails 2.3.5)

I just uninstalled rack 1.2.1 and everything that look like rails3 to me.

@
#gem list

abstract (1.0.0)
actionmailer (2.3.5)
actionpack (2.3.5)
activerecord (2.3.5)
activeresource (2.3.5)
activesupport (2.3.5)
arel (1.0.1)
builder (2.1.2)
bundler (1.0.2)
daemon_controller (0.2.5)
erubis (2.6.6)
fastthread (1.0.7)
file-tail (1.0.5)
i18n (0.4.1)
mail (2.2.7)
mime-types (1.16)
mysql (2.8.1)
passenger (3.0.0)
polyglot (0.3.1)
rack (1.0.1)
rack-mount (0.6.13)
rack-test (0.5.6)
rails (2.3.5)
rake (0.8.7)
rdoc (2.5.11)
rdoc-data (2.5.3)
spruz (0.2.0)
thor (0.14.3)
treetop (1.4.8)
tzinfo (0.3.23)

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Anyone any hints? Also did re-execute the passenger-install-apache2-module and reloaded/restartet apache.