How To Fix /IWFND/CM_DESIGNTIME166 - Function module prefix cannot exceed 13 characters

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_DESIGNTIME -

• Message number: 166

• Message text: Function module prefix cannot exceed 13 characters

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_DESIGNTIME166 - Function module prefix cannot exceed 13 characters ?

  The SAP error message /IWFND/CM_DESIGNTIME166 indicates that there is an issue with the naming convention of a function module in the context of SAP Gateway or OData services. Specifically, the error states that the function module prefix cannot exceed 13 characters. This is a restriction in SAP that ensures function module names adhere to a specific length for consistency and compatibility.
  Cause:
  The error is typically caused by:
  
  Function Module Naming: When creating or modifying an OData service or a function module, the prefix used in the function module name exceeds the maximum allowed length of 13 characters.
  Configuration Issues: Incorrect configuration in the service definition or the service implementation that leads to the generation of a function module with an invalid name.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Function Module Name:
  
  Review the naming convention of the function module you are trying to create or use. Ensure that the prefix (the first part of the function module name) does not exceed 13 characters.
  If you are using a custom namespace, ensure that it is appropriately defined and does not lead to a name that exceeds the limit.
  
  
  
  Modify the Service Definition:
  
  If you are working with an OData service, go to the service definition in the SAP Gateway Service Builder (transaction code SEGW).
  Check the entity sets and their associated function imports. Ensure that the names are compliant with the naming conventions.
  
  
  
  Regenerate the Service:
  
  After making the necessary changes, regenerate the service to ensure that the function modules are created with the correct names.
  Use the "Generate" option in the Service Builder to regenerate the service.
  
  
  
  Check for Existing Function Modules:
  
  If the function module already exists and is causing the error, you may need to rename it or delete it if it is not in use.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to naming conventions for function modules and OData services for further guidance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or solutions for this error.
  Naming Conventions: Familiarize yourself with SAP's naming conventions for function modules, classes, and other objects to avoid similar issues in the future.
  Transaction Codes: Use transaction codes like SE80 (Object Navigator) or SE37 (Function Builder) to explore and manage function modules.
  
  By following these steps, you should be able to resolve the error and ensure that your function module names comply with SAP's requirements.