How To Fix 42582 - Error while writing a TOC file: SSH key for (&1,&2) not found

SAP Error Message - Details

• Message type: E = Error

• Message class: 42 - Information Workbench

• Message number: 582

• Message text: Error while writing a TOC file: SSH key for (&1,&2) not found

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 42582 - Error while writing a TOC file: SSH key for (&1,&2) not found ?

  The SAP error message 42582, which states "Error while writing a TOC file: SSH key for (&1,&2) not found," typically occurs in the context of using the SAP Transport Management System (TMS) or when dealing with transport requests that involve secure shell (SSH) connections. This error indicates that the system is unable to find the required SSH key for the specified user and host, which is necessary for establishing a secure connection.
  Cause:
  
  Missing SSH Key: The SSH key for the specified user and host is not present in the expected location.
  Incorrect Configuration: The SSH configuration may not be set up correctly, leading to the inability to locate the key.
  Permissions Issue: The permissions on the SSH key file may not allow the SAP system to access it.
  User/Host Mismatch: The user or host specified in the error message may not match the actual configuration or may be incorrect.
  
  Solution:
  
  
  Generate SSH Key:
  
  If an SSH key does not exist, generate a new SSH key pair using the command:
  ssh-keygen -t rsa
  
  Follow the prompts to save the key in the default location (usually ~/.ssh/id_rsa).
  
  
  
  Copy Public Key:
  
  Copy the public key (usually ~/.ssh/id_rsa.pub) to the target server's authorized keys:
  ssh-copy-id user@hostname
  
  Replace user and hostname with the appropriate values.
  
  
  
  Check Configuration:
  
  Ensure that the SSH configuration files (~/.ssh/config and /etc/ssh/sshd_config) are correctly set up to allow key-based authentication.
  
  
  
  Verify Permissions:
  
  Ensure that the permissions on the SSH key files are set correctly. The private key should typically have permissions set to 600:
  chmod 600 ~/.ssh/id_rsa
  
  The .ssh directory should have permissions set to 700:
  chmod 700 ~/.ssh
  
  
  
  
  Check TMS Configuration:
  
  In the SAP system, check the Transport Management System (TMS) configuration to ensure that the correct user and host are specified for the transport routes.
  
  
  
  Test SSH Connection:
  
  Manually test the SSH connection from the SAP server to the target server to ensure that it works without prompting for a password:
  ssh user@hostname
  
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to transport issues and SSH configurations for any specific patches or updates that may address this error.
  Documentation: Review the SAP documentation on Transport Management System and SSH key management for detailed guidance.
  Logs: Check the SAP system logs and the SSH logs on the target server for additional error messages that may provide more context.
  
  By following these steps, you should be able to resolve the error message 42582 and successfully write the TOC file.