title: Update an instance variable in BPS
body: <p>Using WSO2 BPS 3.6.0 - is there a (standard) way to update an instance variable in an already running instance? </p>
  
  <p>The reason behind is - the client passes incorrect data at the process initialization, the client may fix its data, but the process instance remembers the wrong values. </p>
  
  <p>I believe I may still update a data in the database, but I wouldn't like to see process admins messing with the database</p>
  
  <p>Edit:
  I am working with the BPEL engine and my idea is to update a variable not from a process design, but as a corrective action (admin console? api?)</p>
  
  <p>Thank you for all ideas.</p>