List aggregation with dynamically rendering a column

[Commander Cognos]

Hi everyone,

I have a list with 2 columns and one measure. One I remove the second column the measure will be aggregated according to the roll-up summary. If I "surpress" the second column with render variable dynamically the measure will not be aggregated. This was working in Cognos 10 - we now use 11.1.3.

Example:
Product Producttype Quantity
A  A1  100
A  A2  100
B  B1  200
Total   400

Remove Producttype
Product Quantity
A  200
B  200
Total   400

Interim fix: Instead of applying the render variable to the list column I can change it to be applyed to the column header and body (through xml or pag structure). Then it is working.

Do you guys have an idea if this a known issue or a bug and will be fixed?

Thanks and cheers,
CommandoCognos