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How to change a FormVariable type of a process in execution?

Question asked by losky on Aug 29, 2012
Latest reply on Aug 31, 2012 by trademak
So, i've implemented activiti for a company and some process of this company
One process is very long lived one (4 months)

At the very last moment we found that a FormVariable that writes a ProcessVariable has the wrong type
The variable shoud be a double but in the process is a long

How can i change the process definition affecting the already executing processes ?
Is it possible to modify an executing process ?

Thanks in advance