How To Fix PU801 - Invalid file access mode "&"

SAP Error Message - Details

• Message type: E = Error

• Message class: PU - Upgrade and Transport Log Messages

• Message number: 801

• Message text: Invalid file access mode "&"

What causes this issue?

A function module (from function group STRF) was called with invalid
value &V1& for the parameter ACCESS.

System Response

Execution of the program was terminated at this point.

How to fix this error?

Contact your SAP system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PU801 - Invalid file access mode "&" ?

  The SAP error message PU801 "Invalid file access mode '&'" typically occurs when there is an issue with the file access mode specified in a program or configuration. This error is often related to file handling in ABAP programs, particularly when dealing with file operations such as opening, reading, or writing files.
  Cause:
  
  Invalid Access Mode: The error is triggered when an invalid or unsupported file access mode is specified. Common access modes include 'I' for input, 'O' for output, and 'A' for append. If a mode other than these is used, or if the mode is misspelled, the error will occur.
  Configuration Issues: There may be issues in the configuration of the file handling settings in the SAP system.
  Programmatic Errors: The ABAP code may contain logical errors where the file access mode is dynamically set or incorrectly defined.
  
  Solution:
  
  Check Access Mode: Review the ABAP code where the file access mode is specified. Ensure that it uses valid access modes ('I', 'O', 'A') and that there are no typos or incorrect values.
  OPEN DATASET <dataset_name> FOR INPUT IN TEXT MODE ENCODING DEFAULT.
  
  Debugging: If the access mode is being set dynamically, use debugging tools to trace the value being assigned to the access mode variable. Ensure it is one of the valid options.
  Review Documentation: Consult the SAP documentation for the specific function or method being used to ensure that the access mode is being applied correctly.
  Check File Path: Ensure that the file path and name are correct and that the file exists in the specified location. Sometimes, the error can be misleading if the file cannot be accessed due to path issues.
  Permissions: Verify that the user has the necessary permissions to access the file in the specified mode.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to file handling and the specific error message PU801.
  ABAP Documentation: Review the ABAP documentation for file handling, particularly the OPEN DATASET, READ DATASET, and CLOSE DATASET statements.
  Community Forums: Look for discussions in SAP community forums or platforms like SAP Community, Stack Overflow, or other developer forums where similar issues may have been discussed.
  
  By following these steps, you should be able to identify and resolve the cause of the PU801 error in your SAP environment.