intercompany asset transfer

Hi Experts,

During intercompany transfer, via Txn: ABT1N i got following error message:

Transaction in area 15 contradicts the net book value rule

Message no. AA660

Diagnosis

The document cannot be posted, as it is contrary to the net book value rule which is checked in area 15.

Procedure

This error usually occurs when you enter proportional values. The proportional values exceed the amount posted, for example, post capitalization of 100 but proportional depreciation to the amount 110. Check your entries and correct them if necessary.

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Area 15 is Tax depreciation... & we have different policies for accounts and tax.

Please guide me what should i do