How To Fix SDEST005 - Error in Class Library; lock not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: SDEST - Messages for RFC Destinations

• Message number: 005

• Message text: Error in Class Library; lock not possible

What causes this issue?

Program &v1& attempted to lock destination &v2& against changes by two
different objects. However, the class library used only permits one
object to request an SAP lock for a destination.

System Response

A class library exception is raised.

How to fix this error?

The program &v1& must be adapted to the class library. Contact the user
responsible for the program.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDEST005 - Error in Class Library; lock not possible ?

  The SAP error message SDEST005 indicates that there is an issue with the class library, specifically that a lock cannot be obtained. This error typically occurs in the context of SAP's spool and output management system, often when trying to access or manipulate spool requests or output devices.
  Causes:
  
  Concurrency Issues: The error may arise when multiple processes are trying to access the same resource simultaneously, leading to a lock contention.
  Database Lock: A database lock might be held by another transaction, preventing the current transaction from obtaining the necessary lock.
  Configuration Issues: Incorrect configuration of the output device or spool settings can lead to this error.
  System Performance: High system load or performance issues can also lead to locking problems.
  
  Solutions:
  
  Check for Locks: Use transaction code SM12 to check for existing locks in the system. If you find locks that are no longer needed, you can delete them (ensure that you have the necessary authorizations).
  Review Spool Requests: Use transaction code SP01 to review spool requests and check if there are any that are stuck or causing issues.
  Adjust Configuration: Review the configuration of the output devices and spool settings in transaction SPAD. Ensure that they are set up correctly and that there are no conflicts.
  System Performance: Monitor system performance using transaction ST22 (dump analysis) and SM21 (system log) to identify any underlying issues that may be affecting performance.
  Restart Services: If the issue persists, consider restarting the spool service or the entire SAP system, if feasible, to clear any locks or contention issues.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage locks.
  SP01: Spool request overview.
  SPAD: Spool administration.
  ST22: Dump analysis.
  SM21: System log.
  
  
  
  SAP Notes: Always check for the latest SAP Notes related to SDEST005 for any updates or patches that may resolve the issue.
  
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.