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I try to make a reminder process on a
tasklist. Every Assigned-To user should become a mail if the due-date is in the
next 3 days. If a user has more than one task, the user should only become one
notification. On SQL I would make a distinct query... but I think with k2 its not possible?

I tried a solution with a “plan per
destination” in which I get all Task-Items filtered on the due date. In the
Destination-Activity I start a Child-Proces, parameter is a variable “send to
child and receive back” with the history of user. In the child process I save
the user in the history variable, and check is the user already in the variable. If not, I send a mail. So I try that a user
only become one mail.

The problem now is, the destination
activities starts parallel not seriell, so the history-user variable in each Child-Process is always
empty.

Has somebody an idea, how can I resolve my
problem?

Thanks for your input