Exception FSG

Hi,

I need to create a FSG Report which will show only exception items if there is any change in the nature of account dynamically.

As in the already existing FSG report, Items are appearing correctly  as per the nature of Account Codes for example as:-

Assets Items appear as positive eg. 100000
Liability Items appear as negative eg (-200000)
Income Items appear as negative eg (-300000)
Expense items appear as positive eg  400000

I need to create a FSG now to show if there is change in the nature of above due to transactions and itmes are changed as follows:-

Assets Items become negative eg.  (-100000)