DI Server: -5002 error while modifying Order lines

Question

When modifying orderlines via the DI Server, I suddenly start getting this error message:
-5002
There is a difference between the document total and its components.  [ORDR.DocTotal][line: 0]
It occurs when trying to modify the price pr line, eg:
<Document_Lines>
<row>
<ItemCode>100017</ItemCode>
<Quantity>1.0</Quantity>
<Price>2200.0</Price>
</row>
</Document_Lines>
Anyone who has seen this error message before?
Message was edited by:
        Trinidad Martinez
Please add your problem subject in the title and not URGENT!

Answer 1

I really really hope that someone can help me with this as soon as possible.
At least I have found a consistent way to produce the error-messages, and a consistent way not to get them, but that is really the strangest part!
If I have a order with eg item code 100017, Quantity 1, and default price 2250,
and I send this xml to the DI server:
<Document_Lines>
<row>
<ItemCode>100017</ItemCode>
<Quantity>3.0</Quantity>
<Price>2100.0</Price>
</row>
</Document_Lines>
I get the error.
However, if I send exactly the same, but with
<Quantity>2.0</Quantity>
I DON'T get the error, and the line is updated accordingly!
Incredible strange!