Could you edit conf\_advanced.php and set $debug = 1;
IF YOU MADE A BACKUP AND TEST IT, you can empty the table evo_useragents before doing the upgrade.

Hi slamp,
Thank you for your interest on my problem.

Yesterday, I've already tried to upgrade after empty evo_useragents as you ask me today. No luck. Here's the debug (I've repeated the task with $debug = 1 for you)

[url=http://tazintosh.free.fr/supports/b2evo_erreur_agnt_type_empty.pdf]The report[/url]

Thank you.

- try to update directly from 1.8.x to 1.10.3 (instead of 1.9.3)

If you want to setup a test environnment, here is my proposal:
- install [url=http://www.wampserver.com/]wamp[/url] or xamp on your local machine to setup a test environment.
- restore your database on this environment
- copy a backup of html files of your running b2evo to this environment.
- using phpmyadmin go to entry blog_siteurl in table evo_blogs and set it to http://localhost/yourpath
- edit conf\_basic_config.php and set $baseurl = http://localhost/yourpath
- verify that your test blog is working.

Exact same error and report when trying 1.10.3 slamp

I check Tazintosh's database and there is a problem inside. The database was corrupted (duplicate index on same column). May be it's the updgrade script. Anyway, I removed duplicate indexes.

Thank you so much slaamp.
I've been able to run 1.10.3 and even 2.x which is running on my blog http://blog.tazintosh.com right now.

I've a bunch of work to do cause I want to edit my skin & add new effect features on it.

Thank you again.