Hi Augusto,
Thanks for your efforts.
For the sake of continuity, the Item Code is the red box below. This Item is in line 15, which is also boxed in red.
I suspect that the "Total" for this item is 0, that is why we are getting the error, but I am not really sure about it.
I tried, in a test db, to post the items whose "Total"s are not 0 and below, and they all went through, but the items that have "Total"s will throw this error.
Thanks!
Sean