Hi all contributors,
Thank you so much for your answers.
I notice that the topic is quite touchy given you discussion.
So let me give you my feedback (sorry but I will not award relpy prize).
Clearing INCO2 in copying routine did work fine.
We also needed to consolidate even further our invoices as we have 3 major clients (98% of turnover) with possibly several hundred invoiced items per client and per day.
As a result I have noticed that some constraints for consolidation will come not from invoice creation step but from invoice cancellation.
So far the "do not touch" fields are: distribution channel and origin of sales tax ID number.
When cleared on invoice creation the system prevents from cancelling, if needed, this document.
