title: Mapping local variables to instance variable in Camunda
body: <p>I have a local variable being set by my application in camunda.</p>
  
  <p>I would like to map this to an instance variable "foo: after the task is complete, however I get an error when setting the value of an outputParameter "bar" to be ${foo}, the data types for both are string.</p>
  
  <p>I cannot seem to find anything in the docs specifically stating ways to map localvariables to instance variables without writing custom java classes and using them as execution listeners(we are not trying to code any custom java within the camunda instance itself due to product requirements passed down from above), am I missing something or is this not existing functionality?</p>