The situtationl;

You entered a claim, you attached a cmn, you want to change the cmn so you
goback into the transaction (change transaction)  when it asks you if you wish to
attach a CMN you answer YES (even though you have already attached a cmn)
When you click OK to complete cmn it just hangs or sits there.  What's wrong?

You cannot change a CMN from the DO TRANSACTIONS patient transaction profile
If you attempt to change a TRANSACTION and answer Yes to attach a CMN a second time
it is ignored.

TO UPDATE OR CHANGE A CMN
FROM THE MAIN MENU
SELECT THE PATIENT FROM THE PATIENT LISTING SCREEN
CLICK ON THE CMN BUTTON , NOT THE DO TRANSACTION BUTTON