Reminders on parallel user tasks

[marco_altieri_7]

I have a workflow that starts several tasks in parallel assigned to different groups.
When the task starts, an email is sent to the members of the group.
Every day a reminder must also be sent to each group that has not completed the task.

I tried different solutions but they all have some issues.

What is the standard way to implement this ?

[p4w3l]

Not sure about "standard" but I like timer boundary event fired to email task with specific time cycle.

[marco_altieri_7]

The problem is that in that case the reminder is the same for all the parallel tasks.
I need to distinguish between tasks that have been already closed and tasks that are really due.

[marco_altieri_7]

I am not sure that my last comment is clear.
If I just define a task with multiple instances to start the parallel tasks and I define a timer boundary for that task, than when the timer fires, only one task will be created. What should I do in this task to send the reminder only to users that have not completed the task ?

[p4w3l]

You could create multi-instance subpprocess and put the task inside then the event on that task

[marco_altieri_7]

Thank you for your answer. The subprocess unfortunately does not work because  there is a bug in the version of Activiti that is integrated in the last version of Alfresco One.
A timer in a subprocess does not work as expected.

[marco_altieri_7]

There is an issue open in jira: https://activiti.atlassian.net/browse/ACT-4090