how to Create subtasks on issue creation in JIRA

Question

Hello,

I use jira 4.4.4

When I click on open step in jira workflow, i see a transition "create"  when I click on create i want to add a post function to create a subtask, but when i add this postfunction i am redirected to the page where is see

the below thing,

to achieve this functionality do i need to use a plugin like this

https://marketplace.atlassian.com/plugins/org.swift.jira.cot

or does it come out of the box in jira?

Here an add button is also there, clicking on the add button causes a stacktrace.

Add Parameters To Function

Add required parameters to the Function

dleng · Accepted Answer

You can try using the Script Runner plugin to create a post function to automatically create a subtask on transition. But you would need some scripting skills though. (If you dont want to pay for the Create On Transition plugin)
https://marketplace.atlassian.com/plugins/com.onresolve.jira.groovy.groovyrunner

https://jamieechlin.atlassian.net/wiki/display/GRV/Post+Functions

E.g.: https://answers.atlassian.com/questions/29809/workflow-post-function-creating-subtask-for-each-user-of-group