'Gross payment item process category' required

What causes this issue?

If the system is to execute a
<DS:GLOS.49A5BAE5A2B21546E10000000A421392>net calculation</>
successfully, a gross payment item has to meet certain requirements. The
attribute <DS:GLOS.49A5F414876A4422E10000000A421392>gross payment item
process category</> is missing.

System Response

The system stops the net calculation process for the complete package
due to data-sets with the wrong data format.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

Check if the problem has been caused by a customer-specific adjustment.
If this is not the case, contact SAP and specify the gross payment
document <LS>VersionID </>and <LS>ItemID</>.
The gross payment document item which caused the problem has the
<LS>VersionID </>&V1& and the <LS>ItemID </>&V2& valid for &V3&.

Error message extract from SAP system. Copyright SAP SE.