sum(Amount) with lastest version of every Key

[#1]

Hi Guys,

can you tell me, how can I use sum(Amount) by KeyNr, within the last version of it in backend?

I want for example sum(amount) all KeyNr from periode january to july ..

like:

sum(amount)->within only max(version)

[maxgro]

sum(aggr(subfield(concat(Aggr(sum(Amount), KeyNr, VersH), '@', -VersH), '@', 1),  KeyNr))