Postiong key error - SD

At time of generating invoice (Tcode VF01) system gives the error that :

Posting keys for account determination for transaction ECS does not exist.

But it is posting basic excise duty for account key EXD.

We are using ECC 5.0 version.

the patch level is:

Basis/abap - 20

SAP_appl - 16

The problem started after applying the following note:

0001033650 Budget 2007-08 (SECess) changes for J1IEX /MIGO.