How To Fix KK691 - Ref. unit of measure & cannot be converted into unit of measure &

KK691 - Overview

• Message type: E = Error

• Message class: KK -

• Message number: 691

• Message text: Ref. unit of measure & cannot be converted into unit of measure &

What causes this issue?

The unit of measure of the object being used as a template cannot be
converted into that of the destination object, because there is no
definition in Customizing of how unit of measure &v1& is to be
converted into unit of measure &v2&.

System Response

Since the lot size has not changed, the item quantities are not
adjusted to the lot size. The system merely accepts the predefined lot
size.

How to fix this error?

Go into Customizing and define how units of measure &v1& and &v2& are
to be converted, or check whether you have specified the correct
reference cost estimate.

Error message extract from SAP system. Copyright SAP SE.

KK691 - Details

• The SAP error message KK691 typically occurs in the context of controlling (CO) when there is an issue with the conversion of units of measure (UoM) in a cost object, such as a cost center or internal order. This error indicates that the reference unit of measure cannot be converted into the target unit of measure.
  
  Cause:
  
  Incompatible Units of Measure: The reference unit of measure and the target unit of measure are not compatible. For example, trying to convert between units that do not have a defined conversion factor.
  Missing Conversion Factors: There may be no conversion factors defined in the system for the units involved.
  
  Configuration Issues: The configuration settings for units of measure in the system may not be set up correctly.
  Data Entry Errors: Incorrect data entry in the transaction that triggered the error.
  
  
  Solution:
  
  
  Check Unit of Measure Settings:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) to check if the