Message type: E = Error
Message class: IS - Equipment management
Message number: 021
Message text: Enter a valid reference indicator
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The SAP error message IS021 "Enter a valid reference indicator" typically occurs in the context of creating or processing documents in SAP, particularly when dealing with financial transactions or document entries. The reference indicator is a field that helps identify the nature of the transaction or document being processed.
Cause: Invalid Input: The reference indicator field may have been left blank or filled with an invalid value that does not correspond to any predefined reference indicators in the system.
Configuration Issues: The reference indicators may not be properly configured in the system, or the user may not have the necessary authorizations to use certain reference indicators. Data Entry Errors: There may be typographical errors or incorrect formats in the input data.
Solution: Check Input: Ensure that the reference indicator field is filled in correctly. Verify that you are using a valid reference indicator that exists in the system. Consult Documentation: Refer to the SAP documentation or help
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