How To Fix 29639 - Field & is not a unit field (data type UNIT)

SAP Error Message - Details

• Message type: E = Error

• Message class: 29 - Bills of Material

• Message number: 639

• Message text: Field & is not a unit field (data type UNIT)

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 29639 - Field & is not a unit field (data type UNIT) ?

  The SAP error message 29639, which states "Field & is not a unit field (data type UNIT)," typically occurs when there is an attempt to use a field that is expected to be of the data type "UNIT" (unit of measure) but is not defined as such in the system. This can happen in various contexts, such as during data entry, report generation, or when executing certain transactions.
  Cause:
  
  Incorrect Field Definition: The field in question is not defined as a unit field in the data dictionary (DDIC). This could be due to a configuration error or a misunderstanding of the data model.
  Data Type Mismatch: The program or transaction is expecting a field of type UNIT, but the field provided is of a different data type (e.g., CHAR, NUMC, etc.).
  Custom Development Issues: If there are custom programs or enhancements, they may not be correctly handling unit fields, leading to this error.
  
  Solution:
  
  Check Field Definition: Verify the data dictionary definition of the field that is causing the error. Ensure that it is defined as a UNIT type. You can do this by using transaction SE11 (Data Dictionary) to look up the field.
  Correct Data Type: If the field is not defined as a UNIT type, you may need to change its definition or use a different field that is correctly defined as a UNIT.
  Review Custom Code: If the error arises from custom ABAP code, review the code to ensure that it is correctly handling unit fields. Make sure that the correct data types are being used when assigning values to unit fields.
  Consult Documentation: Check SAP documentation or notes related to the specific transaction or program you are using to see if there are any known issues or additional configuration steps required.
  Testing: After making changes, test the transaction or program again to ensure that the error is resolved.
  
  Related Information:
  
  Unit of Measure (UoM): In SAP, units of measure are used to define quantities in a standardized way. They are crucial for inventory management, sales, and purchasing processes.
  Data Dictionary (DDIC): The data dictionary in SAP contains definitions of all data elements, structures, tables, and views. Understanding how to navigate and utilize the DDIC is essential for troubleshooting data-related issues.
  SAP Notes: Check SAP Notes for any updates or patches that may address this specific error or provide additional guidance.
  
  If the issue persists after following these steps, it may be beneficial to consult with an SAP technical consultant or reach out to SAP support for further assistance.