Reopen closed voucher?

Hello,

We closed a duplicate voucher and stopped the payment. During the closing process, we believe that we did choose "no" by error,  to the confirmation message " do you want to restore the encumbrance balance?".

We are trying to open the closed voucher to reverse the encumbrance. I did read that a closed voucher cannot be opened from the front end and only a script can be helpful to reverse the closing entry.

I am trying to identify all records used by the component VCHR_CLOSE, in order to write a script to reverse the closing process.

Thank you for your help in advance,