How To Fix AD178 - Field & specified twice. (Saving not possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 178

• Message text: Field & specified twice. (Saving not possible)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message AD178 - Field & specified twice. (Saving not possible) ?

  The SAP error message AD178 ("Field & specified twice. (Saving not possible)") typically occurs when there is an issue with the data being processed in a transaction or during the saving of a document. This error indicates that a field has been defined or specified more than once, which is not allowed in the context of the operation being performed.
  Causes:
  
  Duplicate Field Entries: The most common cause is that the same field has been entered multiple times in a form or data entry screen.
  Custom Development: If there are custom programs or enhancements (like user exits or BAdIs) that manipulate data, they might inadvertently cause fields to be duplicated.
  Data Model Issues: In some cases, issues with the underlying data model or database structure can lead to this error.
  Configuration Errors: Incorrect configuration in the system, such as in the data dictionary or screen layout, can also lead to this error.
  
  Solutions:
  
  Check for Duplicates: Review the data entry screen or form to ensure that no fields are specified more than once. Remove any duplicate entries.
  Debugging: If the error occurs in a custom program, use the debugger to trace the execution and identify where the duplicate field specification is occurring.
  Review Custom Code: If there are any custom enhancements or modifications, review the code to ensure that fields are not being added multiple times.
  Consult Documentation: Check SAP notes or documentation related to the specific transaction or module you are working with for any known issues or patches.
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: The error can occur in various transaction codes depending on the context (e.g., creating or modifying master data, documents, etc.).
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional troubleshooting steps.
  User Forums: Check SAP community forums or other user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the cause of the AD178 error in your SAP system.