How To Fix AD391 - Output length for data type & is set to at least &

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 391

• Message text: Output length for data type & is set to at least &

What causes this issue?

Certain data types have a fixed minimum length. The output length is
composed of the length of the data type and the formatting characters
required and, thus, also has a minimum value.
You have entered an output length that falls below the minimum output
length for the data type you have selected.

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?

Use the minimum output length specified. You may need to check that you
are using the correct data type. Press F4 or F1 on the field <LS>Data
type</> in the domain maintenance function to obtain an overview of
allowed data types or a brief description of the data types.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD391 - Output length for data type & is set to at least & ?

  The SAP error message AD391 indicates that there is an issue with the output length of a data type in your ABAP program or data dictionary. Specifically, it means that the output length for a certain data type is set to a value that is not compatible with the expected length for that data type.
  Cause:
  
  Data Type Mismatch: The output length defined for a data type is either too short or incorrectly defined, leading to a mismatch when the program tries to process or display data.
  Field Length Exceeded: The program is trying to output a value that exceeds the defined length of the field in the data dictionary.
  Incorrect Data Dictionary Definition: The data element or structure may have been incorrectly defined in the data dictionary (SE11).
  
  Solution:
  
  
  Check Data Dictionary Definitions:
  
  Go to transaction SE11 and check the data element or structure associated with the data type mentioned in the error message.
  Ensure that the output length is set correctly according to the requirements of your application.
  
  
  
  Adjust Output Length:
  
  If the output length is too short, you may need to increase it. This can be done by modifying the data element or structure in the data dictionary.
  Make sure to consider the maximum expected length of the data that will be processed.
  
  
  
  Review ABAP Code:
  
  Check the ABAP code where the data type is being used. Ensure that the data being assigned to the field does not exceed the defined length.
  If necessary, implement checks or truncation logic to handle cases where the data might exceed the defined length.
  
  
  
  Transport Changes:
  
  If you make changes to the data dictionary, ensure that these changes are transported to the relevant systems (e.g., from development to quality assurance and production).
  
  
  
  Testing:
  
  After making changes, thoroughly test the application to ensure that the error is resolved and that the output is as expected.
  
  
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE80 (Object Navigator), SE37 (Function Module), SE38 (ABAP Editor).
  Data Types: Understand the different data types in ABAP (CHAR, NUMC, DATS, etc.) and their respective lengths.
  Documentation: Refer to SAP documentation or help resources for more information on data types and their definitions.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis or ABAP development team for further assistance.