How To Fix AQ194 - Unable to link & as an additional field

SAP Error Message - Details

• Message type: E = Error

• Message class: AQ - Message texts for SAP Query

• Message number: 194

• Message text: Unable to link & as an additional field

What causes this issue?

You attempted to link a table to a functional area, but the table
cannot be read with SELECT. Such a table cannot be linked.

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?

If you would like to link a structure choose the option 'additional
structure'. You must then store coding for this structure that fills
the components of the stucture (see additional fields)

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AQ194 - Unable to link & as an additional field ?

  The SAP error message AQ194, which states "Unable to link & as an additional field," typically occurs in the context of data modeling or configuration within SAP systems, particularly when working with InfoObjects, DataSources, or other data-related components in SAP BW (Business Warehouse) or SAP HANA.
  Cause:
  
  Field Compatibility: The field you are trying to link may not be compatible with the existing structure or data type of the target object.
  Field Already Exists: The field you are trying to add may already exist in the target structure, leading to a conflict.
  Data Source Issues: There may be issues with the DataSource or InfoObject from which you are trying to pull the additional field.
  Authorization Issues: Lack of proper authorizations to modify the data model or InfoObject can also lead to this error.
  Technical Settings: The technical settings of the InfoObject or DataSource may not allow for additional fields to be linked.
  
  Solution:
  
  Check Field Compatibility: Ensure that the field you are trying to link is compatible with the target structure. Verify data types and lengths.
  Verify Existing Fields: Check if the field already exists in the target structure. If it does, you may need to modify the existing field instead of adding a new one.
  Review DataSource/InfoObject: Ensure that the DataSource or InfoObject is correctly configured and that it contains the field you want to link.
  Authorization Check: Make sure you have the necessary authorizations to make changes to the data model or InfoObject.
  Technical Settings Review: Review the technical settings of the InfoObject or DataSource to ensure that they allow for the addition of new fields.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to the version of SAP you are using.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered and resolved similar issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench) or RSO2 (DataSource Maintenance) for troubleshooting.
  Debugging: If you have access, consider debugging the process to identify the exact point of failure.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further assistance.