Message type: E = Error
Message class:  SEPMH_DG - EPM HANA DG - Messages 
Message number: 514
Message text: Variable name "&1" is too long
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 SEPMH_DG514, which states that "Variable name '&1' is too long," typically occurs when you are trying to use a variable name in a context where it exceeds the allowed length. In SAP, variable names often have specific length restrictions, and exceeding these limits can lead to this error.
Cause: Variable Name Length: The most common cause of this error is that the variable name you are trying to use exceeds the maximum length allowed by SAP. In many cases, variable names are limited to a certain number of characters (e.g., 30 characters). Incorrect Configuration: Sometimes, the error can arise from incorrect configuration settings or data definitions that allow for longer variable names than what is supported. Data Source Issues: If you are pulling data from an external source or a custom data source, the variable names defined there might not comply with SAP's naming conventions.
Solution: Shorten the Variable Name: Review the
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