Well, the update from 1.8 to 2.0 failed.

I removed all folder except configuration folder and then uploaded the unzipped-files to the site.

This was the result after I run the update.php:

A system error has occurred. Please try again later. You may email the details of this error to the system administrator at xxxxxxx.
exception 'OssnDatabaseException' with message 'Unknown column 'e.permission' in 'field list' SELECT e.guid, e.timecreated, e.timeupdated, e.permission, e.active, e.ownerguid, emd.value, e.type, e.subtype FROM ossnentities as e JOIN ossnentitiesmetadata as emd ON e.guid=emd.guid WHERE(ownerguid ='30' AND type='object' ) ; ' in /home/femblogu/publichtml/ossn/classes/OssnDatabase.php:76 Stack trace: #0 /home/femblogu/publichtml/ossn/classes/OssnDatabase.php(166): OssnDatabase->execute() #1 /home/femblogu/publichtml/ossn/classes/OssnEntities.php(213): OssnDatabase->select(Array, true) #2 /home/femblogu/publichtml/ossn/classes/OssnObject.php(178): OssnEntities->getentities() #3 /home/femblogu/publichtml/ossn/components/OssnGroups/classes/OssnGroup.php(100): OssnObject->getObjectById() #4 /home/femblogu/publichtml/ossn/components/OssnGroups/classes/OssnGroup.php(573): OssnGroup->getGroup('30') #5 /home/femblogu/publichtml/ossn/components/OssnGroups/libraries/groups.php(42): OssnGroup->getMyGroups(Object(OssnUser)) #6 /home/femblogu/publichtml/ossn/components/OssnGroups/ossncom.php(67): ossngetusergroups(Object(OssnUser)) #7 [internal function]: ossngroups('ossn', 'init', NULL) #8 /home/femblogu/publichtml/ossn/libraries/ossn.lib.system.php(224): calluserfuncarra
hp(40): ossntriggercallback('ossn', 'init') #10 /home/femblogu/publichtml/ossn/index.php(11): require_once('/home/femblogu/...') #11 {main}

What now?
Kind regards,
Sally
(P.S. - of course I did a backup before ;-)