COPA reversal with KE4S for cancelled document

Hi,

We are trying to re-post billing documents for a quarter using KE4S to include new characteristics that we added recently.When we run KE4S for a bunch of billing documents for " reversal" it cancels the old existing document and post a new document with values in the new characteristics. The new characteristics show up in most of the new posted documents. But existing cancelled COPA document does not update any of the new characteristics in the new line. We used a enhancement derivation and i tried using a breakpoints and its not going trough the derivation either. Is there something that i am missing or does KE4S not handle cancelled COPA billing documents ?

Any help would be appreciated.

Thanks,

Kunal