How To Fix SPXN029 - First character '&1' of '&2' is invalid; only a(A)-z(Z) permitted

SPXN029 - Overview

• Message type: E = Error

• Message class: SPXN - Proxy Generation

• Message number: 029

• Message text: First character '&1' of '&2' is invalid; only a(A)-z(Z) permitted

Self-Explanatory Message

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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SPXN029 - Details

• The SAP error message SPXN029 indicates that there is an issue with the first character of a certain input string, where the first character is not a valid alphabetic character (a-z or A-Z). This error typically occurs in scenarios where a specific format is expected for identifiers, names, or codes, such as user IDs, material numbers, or other key fields.
  
  Cause:
  The error is triggered when the first character of the input string (denoted as '&2') is not an alphabetic character. The specific character that caused the issue is represented by '&1'. This can happen due to:
  
  Incorrect Input: The user may have entered a value that starts with a number, special character, or whitespace.
  Data Migration Issues: If data is being imported or migrated from another system, it may not conform to SAP's naming conventions.
  Configuration Errors: Custom programs or configurations may not enforce the correct validation rules.
  
  
  Solution:
  To resolve the SPXN029 error, you can