...
You can reverse a whole meter charge run or just certain machines off a charge run.
Reversing the meter charge run will only reverse the linked usages to that charge run not the meter count readings. The usages are deleted from the history off the meters.
A meter charge run may need to be reversed for various reasons. If required based upon what the error maybe, optionally you would recount from the period you reversed the charge run for on wards and then charge accordingly
Any reversal of a meter charge will require you to recount those meters again on a new meter count run for the same period and charge it.
Procedure for reversing an entire meter charge run
...
- Services>Meter charge runs
- Highlight the meter charge run in question that you wish to reverse
Click on 'Reverse Charges' action button in the top ribbon
Expand 
A prompt will appear, you will need to reverse the shipments/invoices that were generated your self.Info 
- Click on Yes to reverse or No to exit out
- The status on the Meter charge run will update to Cancelled
It is now up to you to recount that meter count cycle for the same period and charge it.
Procedure for reversing meter charge runs for certain machines from within a meter charge run
...