Dev, thank you for your help on this.
There is no problem to mantain the unit of measure in the condition, my question is why does the conditions PB00 is at header level without the unit of measure. The number of line items I wanted to creat was two.
All line items contain the same unit of measure.
I want to mantain Header conditions for contract, because it´s a request from out client, for ex. discounts and freights aplicable to all items.
In contracts, there´s a header condition page and an item condition page.
Regards,
Eugénio