How To Fix 0S121 - Enter only one transaction name or one program name

0S121 - Overview

• Message type: E = Error

• Message class: 0S - Messages for the SQL trace

• Message number: 121

• Message text: Enter only one transaction name or one program name

What causes this issue?

You have entered both a transaction name and a program name. However,
you may only enter one or the other.

System Response

Processing continues after the error message.

How to fix this error?

Change either the transaction name or program name entries.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

0S121 - Details

• The SAP error message 0S121 ("Enter only one transaction name or one program name") typically occurs when a user attempts to execute a transaction or program in SAP but has provided multiple transaction names or program names in a context where only one is allowed. This can happen in various scenarios, such as when using transaction codes, executing reports, or calling programs.
  
  Cause:
  
  Multiple Entries: The user has entered more than one transaction code or program name in a field that only accepts a single entry.
  Incorrect Input: The input field may have been populated incorrectly, either by pasting multiple values or by a misunderstanding of the input requirements.
  System Configuration: In some cases, the system configuration or customizations may lead to unexpected behavior when executing transactions.
  
  
  Solution:
  
  Check Input: Ensure that you are entering only one transaction code or program name in the relevant field. Remove any additional entries.
  Use Correct Format: Make sure that the