How To Fix TN643 - Reading start component vector in target system &1 (&2)

SAP Error Message - Details

• Message type: E = Error

• Message class: TN - Support Package Manager (SPAM) Messages

• Message number: 643

• Message text: Reading start component vector in target system &1 (&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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message TN643 - Reading start component vector in target system &1 (&2) ?

  The SAP error message TN643, which states "Reading start component vector in target system &1 (&2)," typically occurs in the context of transport management within SAP systems. This error is related to issues with the transport directory or the transport configuration.
  Cause:
  
  Transport Directory Issues: The transport directory may be corrupted or not properly configured. This can happen if there are issues with the transport files or if the transport directory is not accessible.
  Missing or Incorrect Configuration: The target system may not be correctly configured in the transport management system (TMS). This includes issues with the transport routes or the system's configuration in TMS.
  Authorization Issues: The user may not have the necessary authorizations to read the transport directory or to access the target system.
  Network Issues: There may be network connectivity issues between the source and target systems, preventing the transport system from accessing the required components.
  
  Solution:
  
  Check Transport Directory: Verify that the transport directory is correctly set up and accessible. Ensure that the transport files are not corrupted and that the directory structure is intact.
  Review TMS Configuration: Check the transport management system configuration. Ensure that the target system is correctly defined in TMS and that the transport routes are properly set up.
  User Authorizations: Ensure that the user executing the transport has the necessary authorizations to perform the operation. This may involve checking roles and permissions in the SAP system.
  Network Connectivity: Test the network connection between the source and target systems. Ensure that there are no firewalls or network issues blocking access.
  Transport Logs: Review the transport logs for any additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  Transport Management System (TMS): Familiarize yourself with the TMS configuration and management, as understanding how transports work in SAP can help in troubleshooting.
  System Logs: Review system logs (transaction SM21) for any related errors that may provide additional insights into the problem.
  
  If the issue persists after following these steps, it may be beneficial to consult with SAP support or your internal SAP Basis team for further assistance.