How To Fix E0121 - Error at OPEN '&' (check file)

SAP Error Message - Details

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 121

• Message text: Error at OPEN '&' (check file)

What causes this issue?

An error occurred while opening a status file with 'OPEN DATASET'! The
system then tried to open the file &V1& which was specified via
parameters with the start of status processing.
An error occurred.
The system then tried to open file &V2& that was specified in the port
definition of port &v4& for status inbound processing. This also leads
to an error!

System Response

Confirmation of operating system when opening file &v1&:
&v3&

How to fix this error?

Please compare the following file names with the name of the status
file provided by your EDI subsystem:
&v1& - transferred file
&v2& - file configured in the port for status inbound processing
Check the port configuration:

<DS:TRAN.WE21>Execute function</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0121 - Error at OPEN '&' (check file) ?

  The SAP error message E0121, which states "Error at OPEN '&' (check file)," typically indicates that there is an issue with opening a file in the SAP system. This error can occur for various reasons, and understanding the cause is essential for finding a solution. Here are some common causes, potential solutions, and related information:
  Causes:
  
  File Path Issues: The specified file path may be incorrect or the file may not exist at the specified location.
  File Permissions: The user or the SAP system may not have the necessary permissions to access the file.
  File Locking: The file may be locked by another process or user, preventing SAP from accessing it.
  Network Issues: If the file is located on a network drive, there may be connectivity issues or the network drive may not be accessible.
  File Format: The file may be in an unsupported format or corrupted.
  
  Solutions:
  
  Check File Path: Verify that the file path specified in the program or transaction is correct. Ensure that the file exists at that location.
  Check Permissions: Ensure that the SAP user has the necessary permissions to read/write to the file. You may need to adjust file permissions on the operating system level.
  Check for Locks: Investigate if the file is being used by another process. If so, you may need to wait until it is released or terminate the process that is locking the file.
  Network Connectivity: If the file is on a network drive, check the network connection and ensure that the drive is accessible from the SAP server.
  File Format: Ensure that the file is in the correct format and is not corrupted. You may want to try opening the file with a different application to check its integrity.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Use transaction codes like AL11 to check the file system and see if the file is present.
  Debugging: If you have access to the ABAP code, you can debug the program to see where the error occurs and gather more context about the file operation.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP Basis team or SAP support for further assistance.