How To Fix O8181 - UoM, nr.digits and conv.factor cannot be changed - readings already exist

O8181 - Overview

• Message type: E = Error

• Message class: O8 - IS-Oil: TD Transportation and Distribution

• Message number: 181

• Message text: UoM, nr.digits and conv.factor cannot be changed - readings already exist

What causes this issue?

You tried to alter important attributes of a meter that has
already been used to load product.

System Response

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

How to fix this error?

Once product has been sent through a meter and records exist, certain
parts of master data cannot be changed without ruining the records in
existence. For that reason, it is not allowed.

Error message extract from SAP system. Copyright SAP SE.

O8181 - Details

• The SAP error message O8181 indicates that there is an issue with changing the unit of measure (UoM), number of digits, or conversion factor for a measurement point or reading in the system. This error typically occurs when there are existing readings associated with the measurement point, which prevents modifications to its configuration.
  
  Cause:
  
  Existing Readings: The primary cause of this error is that there are already recorded readings for the measurement point. SAP does not allow changes to the UoM, number of digits, or conversion factor if historical data exists, as this could lead to inconsistencies in the data.
  Data Integrity: SAP enforces this restriction to maintain data integrity and ensure that historical readings remain valid and consistent.
  
  
  Solution:
  To resolve this error, you have a few options:
  
  
  Delete Existing Readings: If it is acceptable to remove the existing readings, you can delete them. This will allow you to change the UoM, number of digits,