How can I automatically create multiple sub-tasks at one go (say by clicking one button)? Is there a plugin available for doing the same? Or should I develop my own plugin?

[nitin gite]

How can I automatically create multiple sub-tasks at one go (say by clicking one button)? Is there a plugin available for doing the same? Or should I develop my own plugin?

Nitin Gite

[Udo Brand]

Another plugin with this feature would be Exocet

https://marketplace.atlassian.com/plugins/com.valiantys.jira.plugins.exocet.jira-plugin-exocet

[Vishnukumar Vasudevan]

You can try with the script runner plugin, https://marketplace.atlassian.com/plugins/com.onresolve.jira.groovy.groovyrunner. It has a post-function 'create-subtask'. You can even re-open subtasks using the same plugin.

[Vishnukumar Vasudevan]

But the script runner is free and has many other good features too.

[Mizan]

Another option is Create on transition plugin

[Mizan]

Absolutely , Its also one of my favourite plugin :)