Message type: E = Error
Message class:  E_ACTION - E-Actions 
Message number: 121
Message text: Enter remark
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.
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The SAP error message E_ACTION121, which prompts the user to "Enter remark," typically occurs in scenarios where a remark or comment is required for a specific action or transaction but has not been provided. This can happen in various modules within SAP, such as during the processing of purchase orders, sales orders, or other transactional activities.
Cause: Missing Input: The user has not filled in the required remark field in the transaction screen. Validation Rules: The system has validation rules that enforce the entry of remarks for certain actions, and these rules are triggered when the user attempts to save or process the transaction without providing the necessary information. Custom Development: In some cases, custom enhancements or user exits may enforce additional requirements for remarks that are not standard in SAP.
Solution: Enter Remark: The most straightforward solution is to locate the remark field in the transaction screen and enter the required information. This may be
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