How To Fix GG656 - No unit field has been defined for the field group 'Quantity'

GG656 - Overview

• Message type: E = Error

• Message class: GG - Messages for FI-SL customizing

• Message number: 656

• Message text: No unit field has been defined for the field group 'Quantity'

What causes this issue?

You have defined period fields for quantities (MSLXX). However, you
must include a unit field for the quantity as a key in the definition
of the table. This key must be called 'RUNIT'.

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?

Define the key field 'RUNIT'.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GG656 - No unit field has been defined for the field group 'Quantity' ?

  The SAP error message GG656, which states "No unit field has been defined for the field group 'Quantity'," typically occurs in the context of SAP's configuration for field groups, particularly when dealing with quantity fields in various modules such as Materials Management (MM) or Sales and Distribution (SD).
  
  Cause:
  The error arises when the system expects a unit of measure (UoM) to be defined for a quantity field, but it is not configured correctly in the system. This can happen due to:
  
  Missing Configuration: The unit of measure for the field group related to quantity has not been defined in the system.
  Field Group Settings: The field group settings may not have been properly set up to include a unit of measure.
  Custom Development: If there are custom developments or enhancements, they may not have accounted for the unit of measure.
  
  
  Solution:
  To resolve the GG656 error, you can follow these steps:
  
  
  Check Field Group Configuration:
  
  Go to the