title: how to disable items from different blocks in oracle form?
body: <p>Need your help in a situation.
  I am working in a module which has 2 different blocks.
  I want to disable the buttons of second block depending upon the option I choose in first block.</p>
  
  <p>For example : If I am choosing “Save” Button in first block the “View” button in Second should be disabled. If I am pressing “Show” Button in first block the “Update” button in Second should be disabled.</p>
  
  <p>I have tried using the set_item_property for the same, but I am getting “unable to reference” Error.</p>
  
  <p>Please suggest how can I disable Item in 1 block through buttons in another block?</p>