Hi I am unable to upgrade on a live database. On top off the install screen i get the message ' Warning: Invalid argument supplied for foreach() in ..../framework/dev/install/MySQLDatabaseConfigurationHelper.php on line 71'. Install complains about a non existing database. Version 3.1 worked perfect.

You should really be testing this upgrade on a localhost development environment before upgrading live.

On another note I did write up a blog post a while back about 3.1 -> 3.2 upgrade that might come in handy: http://www.silverstripe.org/blog/leveling-up-your-silverstripe-cms-website/

Thanks for your advice. My website is live but not public. After updating failed I have tried a clean manual install. The install program says ok on all tests but hitting install button results in the following fatal error:

Fatal error: Uncaught exception 'Exception' with message 'There are two files containing the "_database" class: "....../fam/framework/thirdparty/jstree/_demo/_inc/class._database.php" and "....../fam/framework/thirdparty/jstree/_demo/_inc/class._database_i.php"' in ...../fam/framework/core/manifest/ClassManifest.php:396 Stack trace: #0 [internal function]: SS_ClassManifest->handleFile('class._database...', '/customers/0/5/...', 5) #1 /fam/framework/filesystem/FileFinder.php(158): call_user_func(Array, 'class._database...', '/customers/0/5/...', 5) #2 ......./fam/framework/core/manifest/ClassManifest.php(311): SS_FileFinder->find('/customers/0/5/...') #3 ..../fam/framework/core/manifest/ClassManifest.php(135): SS_ClassManifest->regenerate(true) #4 ...../fam/framework/core/Core.php(100): SS_ClassManife in ...../fam/framework/core/manifest/ClassManifest.php on line 396

My provider states that the problem indicates a php error concerning :
There are two files containing the "_database" class fam/framework/thirdparty/jstree/_demo/_inc/class._database.php fam/framework/thirdparty/jstree/_demo/_inc/class._database_i.php

So i am stuck with a not completed installation