#1910 Unable to select "Upgrade an existing iTop instance" during upgrade process

[Tedi]

Steps to reproduce:

1. Move an existing 2.6.1 iTop installation to an external location.
2. Move the new 2.7.1 web contents to the current iTop location.
3. Open the current iTop location in the browser.
4. Click "Continue" when the Prerequisites Validation: OK is displayed.
5. The "Install or Upgrade choice" screen only allows selecting "Install a new iTop". The option to select "Upgrade an existing iTop instance" is disabled and the following error is displayed in the browser console:

Could not find configuration file: file = /<itop_path_in_the_server>/conf/production/config-itop.php

As per the documentaiton I understand the config-itop.php does not need to be manually created or copied from the old instance. Eventhought I've tried adding the path, setting correct permissions but this did not fix the problem.

[Tedi]

I've just found that I was using some outdated installation steps that I found in the wiki. Following the current version works fine.