inputsum in an expression

[#1]

Hi to all,

I have a question to put on. Although, I have defined the field 'value' as inputfield,

I use an expression by entering the following code:

inputsum(if (FISCPRD=YEAR and MONTH<=VPeriod ,(value))) / 2, which is not editable...

If I remove the division by 2, the expression is editable.

Am I doing something wrong or QlikView does not support calculations in expressions by using the aggregate function 'inputsum'?

Thanks!