How to update a process flow while it is executing??

Hi,
Need help
I'm using WorkFlow 2.6.3.5 here is my issue,
I have a long long workflow, many process and notifications. Sometimes i have to perform changes due to user requirements, but i have started an order (item key) and the workflow won't change, and users do not want to start a new order everytime we have to change something, I mean let's say the order is in process 4 and there has been a new requirement which will modify the next process 5, how do I update the flow ?? Because you go to the monitor page, find process item key (order) 1000 and even if i had changed the flow()workflow builder), order 1000 will have the old flow when you review the diagram.
How do I update the changes (forward, the ones ahead) and stay at the same point the order (item key) was.
Please help me !
Vilma

Hi,
we have the same problem actually.
The life cycle of the complete workflow is over one year.
(We are using subprocess, call them dynamicly... but when processes is waiting a notification, that is not a solution!)
--> Actually we use the API of the workflow to fork processes (with an option that use the new version of definition), "retry" activities in the new process on the same "position" as in the "old process" (Note: That's not always possible - if activity renammed or deleted by example --> Go back to previous correct activity).
That is working fine... for 85% of our cases.
Our actual problem is that some of our process use inter process synchronisation. To solve that, we need the execution sequence of the old activities.
:-( Actually whe can't retrieve the "correct execution sequence" of the activities.
If some of you knows how to retrieve the order of execution order of the activities, I will help us a lot.
(The problem is that there is a begin date for that, but precision is "second"... not enough precise... should be at least a milli second).
--> We are trying to find out the execution sequence by analysing the process definition... But it seems that it will be complicated and long to program.
Any help is welcome.
Stephane

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