Upgrade OJS3.0 Fatal error: Cannot redeclare class Plugin

[resika_arthana]

Hi, I am upgrade OJS from 2.4.8.1 to OJS 3.0. I follow this instruction https://github.com/pkp/ojs/blob/master/docs/UPGRADE. My PHP version is 5.6.24. I get this error.

  # php upgrade.php upgrade
    PHP Notice:  Use of undefined constant BLOCK_CONTEXT_RIGHT_SIDEBAR - assumed 'BLOCK_CONTEXT_RIGHT_SIDEBAR' in D:\xamppphp56\htdocs\ejournal\plugins\blocks\donation\DonationBlockPlugin.inc.php on line 42

Notice: Use of undefined constant BLOCK_CONTEXT_RIGHT_SIDEBAR - assumed 'BLOCK_CONTEXT_RIGHT_SIDEBAR' in D:\xamppphp56\htdocs\ejournal\plugins\blocks\donation\DonationBlockPlugin.inc.php on line 42
PHP Notice:  Use of undefined constant BLOCK_CONTEXT_RIGHT_SIDEBAR - assumed 'BLOCK_CONTEXT_RIGHT_SIDEBAR' in D:\xamppphp56\htdocs\ejournal\plugins\blocks\help\HelpBlockPlugin.inc.php on line 50

Notice: Use of undefined constant BLOCK_CONTEXT_RIGHT_SIDEBAR - assumed 'BLOCK_CONTEXT_RIGHT_SIDEBAR' in D:\xamppphp56\htdocs\ejournal\plugins\blocks\help\HelpBlockPlugin.inc.php on line 50
PHP Notice:  Use of undefined constant BLOCK_CONTEXT_RIGHT_SIDEBAR - assumed 'BLOCK_CONTEXT_RIGHT_SIDEBAR' in D:\xamppphp56\htdocs\ejournal\plugins\blocks\fontSize\FontSizeBlockPlugin.inc.php on line 52

Notice: Use of undefined constant BLOCK_CONTEXT_RIGHT_SIDEBAR - assumed 'BLOCK_CONTEXT_RIGHT_SIDEBAR' in D:\xamppphp56\htdocs\ejournal\plugins\blocks\fontSize\FontSizeBlockPlugin.inc.php on line 52
PHP Notice:  Constant PLUGIN_FILTER_DATAFILE already defined in D:\xamppphp56\htdocs\ejournal\lib\pkp\classes\plugins\PKPPlugin.inc.php on line 46

Notice: Constant PLUGIN_FILTER_DATAFILE already defined in D:\xamppphp56\htdocs\ejournal\lib\pkp\classes\plugins\PKPPlugin.inc.php on line 46
PHP Fatal error:  Cannot redeclare class Plugin in D:\xamppphp56\htdocs\ejournal\classes\plugins\Plugin.inc.php on line 19

Fatal error: Cannot redeclare class Plugin in D:\xamppphp56\htdocs\ejournal\classes\plugins\Plugin.inc.php on line 19

Anyone have solutions? thank you

[ctgraham]

See this thread for a similar situation:

OJS 2.4.8.0 -> 2.4.8.1 Update failing

Hello everyone, long-time listener and first time caller here. Long story short: I work for an academic institution and the previous assistant director of our library took another job in Texas and I adopted some of the previous duties left behind, one of them being management of our OJS system. Now for the fun part: I’ve attempted to run the update through our c-panel interface to get the system to fix an error message that consistently appears whenever we try to input another volume of our jo…

You will want to also perform the same work to look for a duplicated declaration like class ThemePlugin. This might occur if you have mixed OJS2 files with OJS3 files, or if you have multiple copies of the same file with different capitalization.