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How to update thos kind of variable during the workflow ?

Question asked by madn on May 25, 2016
Latest reply on May 31, 2016 by jbarrez
Hi everyone, I'm on activiti enterprise and i don't know how to update thos kind of variable as i defined below

When i try to update them with execution.setVariable it's returning me "null" and I need this variable to use a rest call task (I get a nullPointerException when I arrive to the rest call task)

Someone are using those variables ? What's their name ?