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System.abortJob() not working in UninstallHandler script

I have a package which creates a scheduled job using a post-install script, and saves the id in a custom settings entry. I am trying to create the equivalent uninstall script, but not having much success. The class and associated tests all perform normally when I run them in the IDE. When I run them from the Web UI however, the abortJob call doesn't delete the job and my tests fail. If I comment out the tests and do an actual install and uninstall of the package, the scheduled job is not deleted.


Any idea why this would happen? I know that the documentation indicates that uninstall scripts cannot schedule new jobs, call @future methods, etc, but it doesn't mention anything about deleting existing jobs. The same code, when part of a controller for a settings page, worked fine. Maybe I am misintepreting when the uninstall script actually runs, meaning the only option is for an admin to delete the scheduled job manually, before trying to uninstall the package?


Code snippet:


if(settings != null) {

  try {

    system.debug('Removing scheduled job with id: ' + settings.scheduled_job_id__c);


  } catch (Exception e) {

    system.debug('Error removing scheduled job: ' + e.getMessage());


  delete settings;




Not sure if you have resolved this yourself but the issue is that the uninstall script runs after the package is uninstalled, not before.


Had a similar issue and resolved it by creating a button that called the abort code to allow the schedule to be deleted, rather than leave to sys admin to do.