use of total when fabs is used

[#1]

Sum (TRX)/(Sum(TOTAL(TRX))/Count(DISTINCT(ZIP_CODE)))  - this formula works fine but i am facing issues when i replicate this formula in another expression which is

fabs(Sum(TRX)-(Sum ({$<WEEK_END_DATE={"$(=date( max(WEEK_END_DATE)-7))"}>}TRX)))

/

(sum(TOTAL(fabs(Sum(TRX)-(Sum ({$<WEEK_END_DATE={"$(=date( max(WEEK_END_DATE)-7))"}>}TRX))))))/ (Count(DISTINCT(ZIP_CODE)))

can anyone tell me where im going wrong, the formula does  not show an error

[#2]

Could you send sample qvw file?

[CELAMBARASAN]

Sum over the sum is not possible.

Can you tell me what is your requirement?

Aggr is the only way to use sum over the sum like

Sum(Total Aggr(Fabs(Sum(FieldName)), DimField))