Problem with Data Transfer Process

Hi,

I am extracting my field values from an ECC source system and then passing the value to the bw system via infopackage.

For e.g. Value of Field A = 10 for transaction ID 001. Extracted using delta ( at infopackage level), the value becomes -11 but when extracted using full the value remains as 10 which is correct.

My question is why the delta is retrieving this weird -11 value?

Let me know if you require any further details.

Thank you very much in advance for your time and efford!

Kind regards,

Rebekah