Symptoms

A workflow transition does not work, showing an error in the browser like the below:

 Error creating issue: Could not load FunctionProvider class

The following appears in the atlassian-jira.log:

2012-07-26 08:42:12,766 http-80-1 ERROR xxxxxx 522x245x1 k7ovzk xxx.xxx.xxx.xxx /secure/QuickCreateIssue.jspa [atlassian.jira.workflow.DefaultOSWorkflowConfigurator] Could not load class 'securitylevel.jira.plugin.postfunction.SetSecurityLevelFunction'

Diagnosis

Check the post-functions on the transition that is causing the error. If this is the cause then you will see a bare class name instead of a normal post-function.

Cause

A class is referenced in the post-functions which does not exist. Because of this, the transition is not able to run all steps and gives up.

Resolution

1. Figure out what plugin provides the missing class
2. Install that plugin if it's not installed

3. It may be necessary to delete and recreate the post-function that should have been there