ML81N - Entry sheet shouldn't be accepted

Hi,

My name is Marco and I'm a new user of this wonderful SAP forum.

I have a very big problem, so, I hope that you can help me.

User has created and accepted an entry sheet by the standard transaction ML81N. This entry sheet has two lines:

1) Quantity= 281,200  Gross price= 1,00 EUR;

2) Quantity= 397,130  Gross price= 1,00 EUR.

Releasing the same entry sheet, user has generated a material document (Movement Type 101).

Then, he has reversed the material document (Movement Type 102). The reversal is OK, a new material document (Movement Type 102) was created and the Purchase Order history is correctly updated and displayed.

The problem is that the entry sheet, despite the reversal, is still accepted! In this case, user can't delete the entry sheet.

If he tries to reverse it a second time, System shows the following error message:

M7021 (GR quantity has a deficit of 1).

Can you help me?

Thanks in advance.