How To Fix CN157 - Lengths defined for data fields are not identical

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 157

• Message text: Lengths defined for data fields are not identical

What causes this issue?

You want to define data fields for the reference point for the BOM/PS
interface. The length of the data fields in the BOM and in the network
activity must be identical.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

Choose data fields for the reference point that have an identical
structure

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN157 - Lengths defined for data fields are not identical ?

  The SAP error message CN157, which states "Lengths defined for data fields are not identical," typically occurs in the context of SAP's Project System (PS) or when dealing with data structures that require consistent field lengths. This error indicates that there is a mismatch in the lengths of data fields that are expected to be the same across different structures or tables.
  Cause:
  
  Inconsistent Field Lengths: The most common cause of this error is that two or more data fields that are supposed to have the same length have been defined with different lengths in the data dictionary (DDIC) or in the program code.
  Custom Development: If there are custom developments or modifications in the system, it is possible that the lengths of fields were changed in one place but not in others.
  Data Transfer Issues: When transferring data between different systems or modules, if the field lengths are not aligned, this error can occur.
  
  Solution:
  
  Check Data Dictionary: Review the data dictionary (SE11) for the structures or tables involved in the error. Ensure that the lengths of the fields in question are consistent across all relevant definitions.
  Adjust Field Lengths: If you find discrepancies, adjust the field lengths in the appropriate places to ensure they match. This may involve modifying the data element or structure definitions.
  Review Custom Code: If the error arises from custom ABAP code, review the code to ensure that any data structures or field definitions are consistent with the data dictionary.
  Transport Requests: If the issue arose after a transport request, ensure that all related objects were transported correctly and that there are no inconsistencies between the development and production environments.
  Testing: After making changes, perform thorough testing to ensure that the error is resolved and that there are no side effects from the changes made.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), and SE37 (Function Module) to investigate and modify data definitions.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review SAP documentation related to the Project System or the specific module you are working with to understand the expected field lengths and structures.
  
  If the problem persists after following these steps, it may be beneficial to consult with an SAP Basis or ABAP developer for further assistance.