Roll Back an Unplanned Depreciation

Hi,

When trying to do an unplanned depreciation an in-correct coding string is being generated, this is preventing month end close.  It is the first time that an unplanned depreciation has been tried in our new upgraded system R12. 

We would like to try to roll back this unplanned depreciation to enable us to close the month and then next month we will have more time to analyis what has gone wrong.

Is there an easy way to roll back?

Thanks for any advise.

Ruby

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production