// all STE receipts into WarehouseX require Material Request
cur_frm.cscript.custom_validate = function(doc) {

  var details = wn.model.get("Stock Entry Detail", {parent: doc.name})
  var details_s_WarehouseX = wn.model.get("Stock Entry Detail", {parent:cur_frm.doc.name, s_warehouse:"WarehouseX"})
  var details_MR = $.map(item, function(d) { return d.material_request ? d : null })

  if(purpose=="Material Receipt" && details_s_WarehouseX.length && details.length > details_MR.length) {
        msgprint("You must receive against Material Request.");
        validated = false;
  }

}