New project version: uncompleted processes

[tom....@mycit.ie]

Is it always wrong to specify that uncompleted processes should run the new process version, if changes have been made in the new process execution path?
Or are there types of process path change that could allow old version processes to run successfully in a new version?

I have added an extra gateway split and associated process tasks to a process. The gateway condition uses 'new_version_variable?has_content' so it should cope with old version processes that don't have new_version_variable.

Can uncompleted processes be run in a new version with this type of process change, or does *any* process path change (even just adding gateway + tasks) fundamentally break compatibility with existing processes?

[Gareth Thiveux]

Hi Tom,

If you add or remove any component in a process (task, gateway ...), it will change its execution path.

If ever you decide to apply your new process version yo uncompleted processes, there won't be any problem for instances that are pending or not yet arrived to part of your process that has changed. The problem will come from all the instances which current state is AFTER the change you have made (waiting on a manual task just after the added gateway for example). In this case, when you'll try to "restart" these instances (by validating the afore-mentionned hypothetical manual task), they won't be able to recognise the execution path that has been followed to arrive to this box, as it has changed (the added gateway didn't exist at the time, and the instance doesn't know how to handle this new component), which will cause the instance to get blocked.

That's why you shouldn't apply your new process version to uncompleted processes if any structural modifications (adding or removal of a component) have been made.

Regards,

Gareth THIVEUX   

Consultant Avant-Vente / Pre-Sales Consultant

 Fujitsu RunMyProcess

22 rue Chauchat, 75009 Paris - France (GMT+1)

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2013/7/17 <tom....@mycit.ie>

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