On 09/07/12 15:12, Shlomit Afgin wrote:

I start to install some extension to 1.19.1 mediawiki.

In each extension there is a list of mediawiki version that it support. Can I install on 1.19.1 extension that fit to 1.17.x or I must 1.17.+?

You should install into a 1.19.1 mediawiki the version of the extension for the 1.19 branch. An extension made for a different version will generally work, but it may not.

What extension are you trying to install?