How To Fix ACM055 - Invalid character '&1' in path expression: "&2"

SAP Error Message - Details

• Message type: E = Error

• Message class: ACM - Message-Class for all ACM functions/exceptions

• Message number: 055

• Message text: Invalid character '&1' in path expression: "&2"

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ACM055 - Invalid character '&1' in path expression: "&2" ?

  The SAP error message ACM055 indicates that there is an invalid character in a path expression. This typically occurs in contexts where a path expression is expected, such as in configuration settings, data processing, or when defining certain parameters in SAP applications.
  Cause:
  The error message ACM055 is triggered when the system encounters a character in the path expression that is not allowed. The placeholders &1 and &2 in the error message represent:
  
  &1: The invalid character that was found.
  &2: The path expression that contains the invalid character.
  
  Common causes for this error include:
  
  Typographical errors in the path expression.
  Use of special characters that are not permitted in the context of the path expression.
  Incorrect formatting or syntax in the path expression.
  
  Solution:
  To resolve the ACM055 error, you can follow these steps:
  
  
  Identify the Invalid Character: Check the error message for the specific invalid character (&1) and the path expression (&2) that is causing the issue.
  
  
  Review the Path Expression: Examine the path expression for any typographical errors or special characters. Ensure that the path adheres to the expected format and does not include any invalid characters.
  
  
  Correct the Path Expression: Modify the path expression to remove or replace the invalid character. Ensure that only valid characters are used, which typically include alphanumeric characters, underscores, and certain other characters depending on the context.
  
  
  Test the Changes: After making the necessary corrections, re-run the process or transaction that triggered the error to verify that the issue has been resolved.
  
  
  Consult Documentation: If you are unsure about the valid characters or format for the path expression, refer to the relevant SAP documentation or guidelines for the specific module or function you are working with.
  
  
  Seek Help from SAP Support: If the issue persists after making corrections, consider reaching out to SAP support or consulting with a technical expert who can provide further assistance.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or updates related to the ACM055 error.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the specific module or application documentation for guidelines on valid path expressions and configurations.
  
  By following these steps, you should be able to identify and resolve the ACM055 error effectively.