Error occurred while installing the ZoteroImport plugin

Omeka Classic Plugins
#1

Zotero import quit working (we don’t know why) so we uninstalled the Zotero plugin, but when we attempt to reinstall it we receive the error message:

The following error occurred while installing the ZoteroImport plugin: An element set by the name “Zotero” already exists. You must delete that element set to install this plugin.

Deleting the element set warns me:

Are you sure?
This will delete the element set and all elements assigned to the element set. Items will lose all metadata that is specific to this element set.

I really don’t want to reenter all the metadata that we’ve already entered from previous imports and what we have entered manually. Is there another solution or a work around?

#2

You can skip the effort to install the element set by opening up ZoteroImportPlugin.php and comment out the line to install at line 193 by putting // in front of it. It’ll look like

//        insert_element_set(self::ELEMENT_SET_NAME, $elements);

That’ll let the reinstall continue without that error. Then, I expect we’ll have to figure out why it quit working. First thing to check is that you have the latest version of the plugin

#3

Thanks, Patrick. I installed the latest version & commented out that line but still receive the same error. Any other idea what I might try? thx!

#4

Ah, my bad. I made a bad assumption about where that error was coming from. In addition to that line, comment out this whole block, just a few lines above it

/*
        if ($this->_db->getTable('ElementSet')->findByName(self::ELEMENT_SET_NAME)) {
            throw new Omeka_Plugin_Installer_Exception(
                __('An element set by the name "%s" already exists. You must delete that element set to install this plugin.', self::ELEMENT_SET_NAME)
            );
        }
*/
#5

Ok, that worked. I’ll see if the import works now. Thanks!

#6

I had a similar issue just now. I kept getting an error message when I tried to add in my atom url to connect my Zotero in Omeka. I deleted the files and uninstalled Zotero. Now I’m having trouble reinstalling. Could you help? If I follow the solution above, where exactly do I “comment out” the above code?

Thank you! :checkered_flag::slightly_smiling_face::slightly_smiling_face::slightly_smiling_face::slightly_smiling_face::slightly_smiling_face:

#7

This is the message I get:

The following error occurred while installing the ZoteroImport plugin: An element set by the name “Zotero” already exists. You must delete that element set to install this plugin.

#8

On the Element Sets page you should see an option to delete the Zotero element set.

#9