How To Fix RFM_MM_PUR_PC042 - Order unit of item &1 cannot be converted from &2 to &3.

RFM_MM_PUR_PC042 - Overview

• Message type: E = Error

• Message class: RFM_MM_PUR_PC -

• Message number: 042

• Message text: Order unit of item &1 cannot be converted from &2 to &3.

What causes this issue?

You have entered a principal purchase agreement item whose unit of
measure is not defined in the article master.

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?

Enter an article whose unit of measure is same as the principal purchase
agreement item or define the required unit of measure for the article.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RFM_MM_PUR_PC042 - Order unit of item &1 cannot be converted from &2 to &3. ?

  The SAP error message RFM_MM_PUR_PC042 indicates that there is an issue with the order unit of a specific item in a purchasing document. The message states that the order unit of item &1 (where &1 is the item number) cannot be converted from &2 (the current unit) to &3 (the target unit). This typically occurs in scenarios involving unit of measure (UoM) conversions in purchasing documents, such as purchase orders or purchase requisitions.
  
  Cause:
  
  Incompatible Units of Measure: The units of measure defined for the item may not be compatible for conversion. For example, you might be trying to convert from a unit that cannot be directly converted to the target unit.
  Missing Conversion Factors: There may be no conversion factors defined in the system for the units involved. SAP requires conversion factors to be defined in the material master for different units of measure.
  Incorrect Configuration: The configuration settings for units of measure