1.1.6升級到1.2.5出現的錯誤

[gcboytw]

升級的過程中出現
Fatal error: Call to a member function on a non-object in C:\AppServ\www\plog\class\dao\userpermissions.class.php on line 84

查詢檔案userpermissions.class.php的code如下
80   if( !$doNotCleanCache ) {
81   $this->_cache->removeData( $perm->getUserId(), CACHE_USER_PERMISSIONS );
82   $this->_cache->removeData( $perm->getUserId(), CACHE_USERINFO );
83   $userInfo = $perm->getUserInfo();
84   $this->_cache->removeData( $userInfo->getUserName(), CACHE_USERIDBYNAME );

請大家幫幫忙
我試過重新上傳，也把tmp的檔案都清光了
但是依然有一樣的問題