Transaction unit of measure for BSW % has to be at ambient conditions

What causes this issue?

The Quantity Conversion Interface (QCI) allows you to calculate target
quantities that are corrected for BSW content (Volume percentage). In
order to obtain a consistent result, the transaction quantity has to be
entered at ambient conditions.
<ZH>Example</>
You post a goods movement of 1,000 barrels of crude oil with a BSW of
10%. You should enter 1,000 BBL and the material temperature (60 FAH)
and not 1,000 BB6 (barrel at 60 FAH). Then, the target quantities will
be corrected using the BSW % factor. Target units should always be
masses or volumes at defined standard conditions. If you enter 1,000 BB6
instead and also have UG6 (gallons at 60 FAH) defined in the unit of
measure group, the result appears to be inconsistent. The system then
stores a movement of 1,000 BB6 and 37,800 UG6.
If you enter 1,000 BBL and a BSW of 10%, the system calculates both the
900 BB6 and 37,800 UG6 value correctly (if defined in the UoM group) and
stores these values, in addition to the uncorrected transaction
quantity of 1,000 BBL.

System Response

The system stops processing. This message can be customized to appear as
a warning or information message or not to appear at all.

How to fix this error?

Change the transaction unit of measure to a unit of measure at ambient
and specify the material temperature according to the temperature
specifications of the initial transaction unit of measure.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.