Please can you confirm that you are using my pdf annotation submission/feedback plugins, rather than the standard editpdf plugin built in to Moodle 2.6?
Assuming you are using my plugins, then table you mention should have been automatically created when they were first installed - you would be unable to draw any annotations onto the page without them (comments might still be possible to add to the page).
If you've not got any annotated assignments, then the easiest way to fix the problem might be to delete the plugin via Site admin > Plugins > Plugins overview. If that is not possible, you could take a look at the table definition ( in the code or online at https://github.com/davosmith/moodle-assignfeedback_pdf/blob/master/db/install.xml ) and attempt to manually recreate it using whatever tool you use to access your site's database.
Yes. I am using this plugin. I downloaded from github and reinstalled. I am not sure how to install manually.
You say you have reinstalled the plugin - do you mean you deleted it from the admin interface and then installed a fresh copy?
Did this fix the problem?
If that did not work (and I can't think of any reason why it wouldn't have worked in the first place), then the only other suggestion I can make is that you ask whoever maintains your database system to manually create the database table, using whatever software they use to connect to the database (e.g. adminer, PHPMyAdmin or the relevant command-line tools).
Yes. This is what I did. Now I am getting the error that, "Higher version already installed". Impossible to get out of this loop. Installed here: /mod/assign/feedback/pdf Is this your plugin?