How To Fix DH138 - Output field & on selection screen must be set by search help exit

DH138 - Overview

• Message type: E = Error

• Message class: DH - DD: Messages for search helps

• Message number: 138

• Message text: Output field & on selection screen must be set by search help exit

What causes this issue?

The flag for the specified <DS:TX.DDDOK_SHLP_PARAMETER>parameter</> of
the search help is set, indicating that it should appear in the dialog
box as display field to restrict the values. Such a display is only
meaningful if the parameter has contents at the time when the dialog
box is displayed. Since the parameter is not an IMPORT parameter does
not have a default value, the parameter can only get a value by
assigning a value with the <DS:TX.DDDOK_SHLP_EXIT>search help exit</>
at a suitable <DS:TX.DDDOK_SHLP_STEP>time</>.

System Response

The action is continued.

How to fix this error?

Check if the search help exit really fulfills the function described.
If this is not the case, reset the flag in the maintenance transaction
of the ABAP Dictionary for the processed search help.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DH138 - Output field & on selection screen must be set by search help exit ?

  The SAP error message DH138 indicates that an output field on a selection screen must be set by a search help exit. This typically occurs when a selection screen is designed to use a search help (a feature that provides a list of possible values for a field) but the necessary logic to populate that field is not correctly implemented or is missing.
  
  Cause:
  
  Missing Search Help Exit: The search help associated with the field does not have an exit function defined, which is required to populate the field with the appropriate values.
  Incorrect Configuration: The search help might be incorrectly configured or not linked properly to the field on the selection screen.
  Field Attributes: The field may be defined in a way that requires a search help exit but is not set up to handle it.
  
  
  Solution:
  
  
  Define a Search Help Exit: If you are a developer, you need to create a search help exit