J2.5 to J3.4, Call to a member function asXML()

hello

I am upgrading my web from j2.5 to latest Joomla! 3.4.1 but I have error 500 once I try any page related to flexicontent

here are the logs :
[Mon Apr 06 19:15:27 2015] [warn] [client 90.163.35.18] mod_fcgid: stderr: PHP Fatal error: Call to a member function asXML() on a non-object in mypath/components/com_flexicontent/classes/flexicontent.helper.php on line 3830, referer: www.mydomain.com/index.php?lang=fr

This is quite urgent as I need to do the migration asap.

flexicontent version : FLEXIcontent version 2.2.1 rc

thx for your help

note that I have same issue from backend when I try to access to flexicontent templates. So I guess something is broken here, but I cannot find where

Hello

J2.5 code is executed instead of J3.x,

J3 version is not detected / reported

-- try cleaning both frontend and backend cache,
-- make sure flexicontent system plugins are published, open the 2 flexicontent plugins and re-save them
-- try re-installing FC v2.2.1 (do not uninstall) or upgrading to v3 BETA5a (note fancybox loading is broken use multibox instead)
github.com/FLEXIcontent/flexicontent-cck/releases

I already cleared cache
which plugin do I have to open and re save ?
I have those 3 unpublished :
PLG_CONTENT_FLEXIBREAK content flexibreak Accès Public 10262
Smart Search - FLEXIcontent finder flexicontent Accès Public 10261
PLG_FLEXICONTENT_FLEXINOTIFY

If I could avoid to re install.... could be great

arf, it was coming from a new plugin from admintool.....I disable it and it's fine ! sorry for distubing you !

/*Not working anymore.... coming crazy...*/

Hello

what is the name of the plugin ?

if you reenable the plugin then you get this error ?? try it

-- this error is possible only if FLEXIcontent thinks that Joomla version is J2.5 !!!

the way that we get the Joomla version is by calling the Joomla API to get version !