How To Fix SG810 - Physical file name cannot start with a parameter.

SAP Error Message - Details

• Message type: E = Error

• Message class: SG - Global Pool for Cross-Application Developments

• Message number: 810

• Message text: Physical file name cannot start with a parameter.

What causes this issue?

You are trying to enter a physical file name that begins with <(>
<<)>PARAM_X>. For security reasons this is not possible because it could
be used by an attacker for a directory traversal attack if the logical
path is empty.

System Response

The physical name beginning with <(><<)>PARAM_X> is not permitted.

How to fix this error?

Add a character string in front of <(><<)>PARAM_X>, for example MYFILE
<(><<)>PARAM_1>, or enter a logical path for the logical file.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SG810 - Physical file name cannot start with a parameter. ?

  The SAP error message SG810, which states "Physical file name cannot start with a parameter," typically occurs when there is an issue with the naming convention of a physical file in the SAP system. This error is often encountered when working with file paths or file names in various SAP transactions or programs, particularly when dealing with file uploads or downloads.
  Cause:
  The error is caused by the following reasons:
  
  Incorrect File Naming: The physical file name provided starts with a parameter (e.g., &, %, etc.) or is incorrectly formatted.
  Improper Configuration: The configuration settings for file handling in the SAP system may not be set up correctly, leading to issues with file paths.
  User Input Error: The user may have inadvertently entered a file name that does not conform to the expected naming conventions.
  
  Solution:
  To resolve the SG810 error, you can take the following steps:
  
  
  Check File Name: Ensure that the physical file name does not start with any special characters or parameters. It should follow the standard naming conventions (e.g., alphanumeric characters, underscores).
  
  
  Review File Path: If you are specifying a file path, make sure that the path is correctly formatted and does not include any invalid characters or parameters at the beginning.
  
  
  Use Valid Characters: Ensure that the file name contains only valid characters. Avoid using spaces, special characters, or starting with a parameter.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidelines on file naming conventions and formats specific to the transaction or program you are using.
  
  
  Test with Different Names: If you are unsure about the naming conventions, try using a simple, straightforward file name (e.g., testfile.txt) to see if the error persists.
  
  
  Check User Authorizations: Ensure that you have the necessary authorizations to create or access files in the specified directory.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may be involved in file handling, such as AL11 (Display File Directories) or CG3Z (Upload File).
  SAP Community: Engage with the SAP Community forums for additional insights or similar experiences from other users.
  
  By following these steps, you should be able to identify and resolve the issue causing the SG810 error in your SAP environment.