Put a whole record in Read Only

Hi all,

My system is HPSM 9.41 p3 over Windows.

I need to put a Problem record in Read Only until the Operator push the button "Take Over".

This button changes the Phase and the Status of the problem (rootcause).

I need it when the problem is in status  "Assign" and phase "Categorization".

I tried with ds "pbm.view" and the variable $L.can.update but not work.

Some ideas?

Thanks in advance.