Info requested on expression and parameter override at object or table level

[#1]

Hi All,

need your help to resolve below issue

variable defined

vft=placeholder
eSumAmt=Sum({$<$(vft)>} AMT)
TT='[A Date]={">=$(vMonthStart) <=$(A Date)"}'

want to override at object level
vft=$(TT)

Wants to calculate
($($(='eSumAmt'),$(TT)  ) )

Current issue
getting out put as null, it seems there is issue with to calculate syntax

[marcus_sommer]

I think it should be look more like this:

eSumAmt=Sum({$<$1>} AMT)

TT=[A Date]={">=$(vMonthStart)<=$(A Date)"}

$(eSumAmt($(TT)))

- Marcus