How To Fix D4656 - Cannot read file &1 on host &2

SAP Error Message - Details

• Message type: E = Error

• Message class: D4 - DB2/400 specific messages

• Message number: 656

• Message text: Cannot read file &1 on host &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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message D4656 - Cannot read file &1 on host &2 ?

  The SAP error message D4656 "Cannot read file &1 on host &2" typically indicates that the SAP system is unable to access a specified file on a remote host. This can occur for various reasons, and understanding the cause is essential for troubleshooting the issue.
  Causes:
  
  File Path Issues: The specified file path may be incorrect or the file may not exist on the host.
  Permissions: The user under which the SAP system is running may not have the necessary permissions to read the file.
  Network Issues: There may be network connectivity problems between the SAP system and the host where the file is located.
  Host Configuration: The remote host may not be properly configured to allow access from the SAP system.
  File System Issues: The file system on the host may be down or experiencing issues, preventing access to the file.
  SAP Configuration: The SAP system may not be configured correctly to access external files.
  
  Solutions:
  
  Verify File Path: Check the file path specified in the error message to ensure it is correct and that the file exists on the host.
  Check Permissions: Ensure that the user account running the SAP application has the necessary permissions to read the file. You may need to adjust file permissions or ownership on the host.
  Test Network Connectivity: Use tools like ping or telnet to check if the SAP system can reach the host. Ensure that there are no firewall rules blocking access.
  Review Host Configuration: Ensure that the host is configured to allow access from the SAP system. This may involve checking settings in the operating system or network configuration.
  Check File System Status: Verify that the file system on the host is operational and that there are no issues preventing access to files.
  SAP Configuration: Review the SAP configuration settings related to file access, such as logical file names and file paths, to ensure they are set up correctly.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Logs: Review the SAP application logs (transaction SLG1) and system logs (transaction SM21) for any additional error messages or context that may help diagnose the issue.
  Documentation: Refer to SAP documentation for information on file handling and external file access configurations.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP Basis team or SAP support for further assistance.