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Migrating process instances to newer versions

Question asked by hamed1369 on May 8, 2013
Latest reply on Nov 7, 2016 by jperez11
I am M.S Student in Software Engineering, in Sharif University Of Technology,
I am interested in Dynamic Workflow and I've studied some papers in this field and trying to prepare my proposal. But it's so strange to me that there is no proven mechanism in Activiti Engine to handle the problem of "Migrating process instances to newer versions" with progressive policy. I mean, adapting active processes to new Schema (PD) if it's possible (It may be impossible).
My Question is, Why there is no proven implemented mechanism in Activiti Engine to handle this?
I love Activiti and really interested to contribute and solve any probable and preventive problem of this field in my thesis.