How To Fix SG812 - Physical file path cannot start with a parameter.

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 812

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

What causes this issue?

You are trying to enter a physical file path 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.

System Response

A physical file path beginning with <(><<)>PARAM_X> is not permitted.

How to fix this error?

Add a path in front of <(><<)>PARAM_X>, for example C:\TEMP\<(>
<<)>PARAM_1>, or "/tmp/<(><<)>PARAM_1> for UNIX.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SG812 - Physical file path cannot start with a parameter. ?

  The SAP error message SG812, which states "Physical file path cannot start with a parameter," typically occurs when there is an issue with the way a file path is specified in a configuration or program. This error is often related to the use of parameters in the file path, which is not allowed in certain contexts.
  Cause:
  
  Incorrect File Path Specification: The error usually arises when the file path for a physical file is incorrectly defined, starting with a parameter (e.g., & or %).
  Dynamic File Paths: If the file path is being constructed dynamically and inadvertently starts with a parameter, it can trigger this error.
  Configuration Issues: In some cases, the error may stem from incorrect configuration settings in the SAP system or in the specific transaction being executed.
  
  Solution:
  
  
  Check File Path: Review the file path specified in the relevant configuration or program. Ensure that it does not start with a parameter. The path should be a valid absolute or relative path without leading parameters.
  
  
  Modify the Path: If the path is being constructed dynamically, ensure that the logic used to build the path does not prepend any parameters. For example, if you are using a variable to define the path, make sure it is correctly initialized and does not lead with a parameter.
  
  
  Use Correct Syntax: Ensure that the syntax used for defining the file path adheres to SAP standards. For example, if you are using a file path in a program, it should be enclosed in quotes and properly formatted.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction or program you are working with to ensure that you are following the correct guidelines for file path specifications.
  
  
  Testing: After making changes, test the configuration or program to ensure that the error is resolved.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific versions of SAP may have bugs that are documented in SAP Notes.
  Transaction Codes: If this error occurs in a specific transaction, look for transaction codes related to file handling or configuration settings that may be relevant.
  Community Forums: Consider searching or posting in SAP community forums or discussion groups, as other users may have encountered and resolved similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or technical team for further investigation.