How To Fix ISSR2026 - List output not defined in Customizing; list type &1 not defined

ISSR2026 - Overview

• Message type: E = Error

• Message class: ISSR2 - Message Class for Statutory Reporting: Output

• Message number: 026

• Message text: List output not defined in Customizing; list type &1 not defined

What causes this issue?

In table <NP>TISSR_OUT_LT</>, the entry for list type &V1& of SR variant
&V2& does not exist.

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?

Check the selection options for SR variant &V1& and list type &V2& as
well as the Customizing settings in the IMG activity
<DS:SIMG.ISSR_OUT_DEF_LIST>Define List Output</> under <ZK>Definition of
List Type</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

ISSR2026 - Details

• The SAP error message ISSR2026, which states "List output not defined in Customizing; list type &1 not defined," typically occurs when the system is unable to find the necessary configuration for a specific list output type in the Customizing settings. This can happen in various SAP modules, particularly in the context of reporting or output generation.
  
  Cause:
  
  Missing Customization: The specific list type referenced by &1 is not defined in the Customizing settings. This could be due to a missing entry or an incorrect configuration.
  Incorrect List Type: The list type being requested may not exist or may have been deleted or renamed in the system.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access the list output configuration.
  
  
  Solution:
  
  
  Check Customizing Settings:
  
  Go to the relevant Customizing transaction (usually SPRO).
  Navigate to the area related to the specific module or application where the error occurred.
  Look for the section related to list outputs or