HI
First you need understand the rules of depreciation. When you try post a depreciation in the past (2011 year) the system verify the rules preconfigured in avaliation area 1. These rules going allowing or not yours change.
I trying give you an example.
I go try simulate a change uselife value of the asset on depreciation area 1. You'll see that when I try changing the value of uselife from 5 to 2, the issue message is displayed.
step-by-step
1 - I trye change the uselife value of avaliation area 1from 5 - 2.
2 - the system makes a recalculation for asset, using the new value of uselife. The result will be a negative value.
3 - the system before posting negative value on the avaliation 1. The system makes a verify the preconfigured rules on the valuations areas. Tcode: OADB
- Net Book Value: Only Positive Values or Zero Allowed.
4 - The preconfigured rules on the valuations areas not allow post negative values on avaliations areas. - Only Positive Values or Zero Allowed
5 - the issue is displayed.
Change - Net Book Value: ALL VALUES ALLOWED
The issue no more displayed
Kind Regards.
Jandoval Nascimento