How To Fix W_CB148 - No field checks possible at 'BU' point (before save)

SAP Error Message - Details

• Message type: E = Error

• Message class: W_CB -

• Message number: 148

• Message text: No field checks possible at 'BU' point (before save)

What causes this issue?

You want to create a check for a field that is to be performed at the
'BU' point (before the save)

System Response

At the 'BU' point, no further checks are performed at field level. It is
only possible to perform an entire structure check. It is therefore not
possible to create checks for a specific field at the 'BU' point

How to fix this error?

Delete the field name that you want to check, or change the execution
time

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message W_CB148 - No field checks possible at 'BU' point (before save) ?

  SAP Error Message:
  
  W_CB148 No field checks possible at 'BU' point (before save)
  
  Cause
  This warning message occurs in the SAP system during the processing of business transactions, typically in the context of Business Add-Ins (BAdIs) or user exits related to document processing (e.g., financial documents, sales documents, etc.).
  
  The message indicates that the system is trying to perform field checks (validations) at a point in the processing called 'BU' (which stands for Before Update or a similar processing step).
  However, at this point, field checks are not possible because the data is either not yet fully available or the system does not allow validations before the save/update operation.
  This usually happens when custom code or enhancements attempt to trigger field checks or validations at an inappropriate processing point.
  
  
  When does it occur?
  
  During document processing, especially when custom validations or field checks are implemented in user exits or BAdIs.
  When the system tries to perform field checks before the document is saved but the processing point 'BU' does not support such checks.
  Common in FI (Financial Accounting), MM (Materials Management), SD (Sales and Distribution) modules where document validations are critical.
  
  
  Solution
  
  
  Check the Enhancement or Custom Code:
  
  Identify where the field checks are being triggered in the custom code or user exits.
  Ensure that field checks are not called at the 'BU' point or any point before the document is saved.
  Field checks should be performed at appropriate points, typically after the document is saved or at points where the data is stable and complete.
  
  
  
  Adjust the Processing Point:
  
  Modify the enhancement implementation to perform validations at a different processing point where field checks are allowed.
  For example, use points like 'AFTER_SAVE' or 'AFTER_UPDATE' instead of 'BU'.
  
  
  
  Use Standard SAP Validation Mechanisms:
  
  Instead of custom field checks at inappropriate points, leverage SAP standard validation and substitution rules where possible.
  Use transaction codes like GGB0 (Validation) or GGB1 (Substitution) for FI validations.
  
  
  
  Consult SAP Notes and Documentation:
  
  Check for SAP Notes related to message W_CB148 for any module-specific advice.
  Review the documentation of the BAdI or user exit where the error occurs to understand the correct usage.
  
  
  
  
  Related Information
  
  Message Class: CB (related to document processing and field checks)
  Processing Points: SAP uses various processing points in document processing (e.g., Before Save, After Save, Before Update). Not all points allow field checks.
  BAdIs/User Exits: Common places where this message arises due to improper timing of validations.
  Transaction Codes:  
  
  GGB0 - Validation  
  GGB1 - Substitution  
  SMOD / CMOD - User exits  
  SE18 / SE19 - BAdI implementations
  
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Attempt to perform field checks at the 'BU' (Before Update) point where checks are not allowed.
  
  
  Effect
  Warning message W_CB148 is raised, indicating no field checks possible at this point.
  
  
  Solution
  Move field checks to a valid processing point after save/update; adjust custom code accordingly.
  
  
  Related Info
  Check BAdI/user exit documentation, use standard validations, consult SAP Notes if needed.
  
  
  
  
  If you provide the exact module or enhancement where this occurs, I can help with more specific guidance.