Error during unit conversion of business volume for condition basis

What causes this issue?

Translation: Largely identical to NAA084
The business volume for the condition basis (see calculation rule) is
taken from the document conditions in unit &V1&. However, as the update
of business volume data is to be carried out in unit &V2&, conversion is
needed.
However, it is not possible to convert units &V1& and &V2&.

System Response

Business volume data is not updated, as the business volume for the
condition basis is missing.

How to fix this error?

Ensure that the system is able to determine the business volume in the
form given above.
For this, the gross/net weight, volumes, points, and the required units
of measure should be maintained in the material master, and/or suitable
unit of measure conversion should be defined in the material master
(alternative unit of measure) or info record (conversion of order unit
according to points).
The data can be copied from the material master and info record to the
document item and changed. The system attempted to use this data (item
data, info record, material master) to carry out the conversion, but
this attempt was unsuccessful.
If necessary, contact your system administrator.
IF &DEVICE&='SCREEN'
If you have the necessary authorization, you can maintain the material
master directly.
AUFRUF DER TRANSAKTION MATERIALSTAMM AENDERN

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<DS:TRAN.MM02>Perform function</>
If you have the necessary authorization, you can maintain the info
record directly.
AUFRUF DER TRANSAKTION INFOSATZ AENDERN
<DS:TRAN.ME12>Perform function</>
ENDIF
The document concerned (purchasing document (purchase order, scheduling
agreement) or Settlement Management document (supplier billing document,
settlementdocument)) has number &V3&, item &V4&.

Error message extract from SAP system. Copyright SAP SE.