"Error in calculated dimension"

[boryspower]

Hi,

Could You please explain me why I get 'error in calculated dimension'? I try to sum the stock of certain articles in Dimension. I don't want to put it to the Expression, because then the value of stock will appear under each order_spec_id, and I want to have it displayed only once...

Borys

[boryspower · Accepted solution]

I found that I have to use aggr() function instead of bare sum()!