Update input variables in a jbpm Business rule

I am trying to use a Business Rule in a jbpm process. The Business Rule has an input and an output associated to a process variable.

I try to insert and pass param to the process. The rule considers the inserted value to the process instead of considering the Business Rule. I followed this tuto. I think that I am looping something, could you help please.

Expected behavior is to have in the console output incrementation firing... New Value:2 instead of 6.

The following code shows the business rule:


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By: StackOverFlow - 7 days ago

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