Thanks for your response Rubielyn_J.

There are no error messages, the problem is functional:  Inventory Items with sales that occurred before their purchase are somehow bringing back to inventory the original inventory value after condense even though that inventory was already sold.

This is a deal breaker for migrations from QB to QBO in some industries where sale before purchase is more common.

If Intuit is willing to work on this bug I will be happy to show the problem in private.

Best Regards, Pedro