How To Fix SIG605 - System locking error

SAP Error Message - Details

• Message type: E = Error

• Message class: SIG - Digital Signature

• Message number: 605

• Message text: System locking error

What causes this issue?

A system error occured when the batch record was being locked.

System Response

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

How to fix this error?

Notify the system administrator.

Procedure for System Administrators

When a digital signature is executed, entries in the internal table
SIGNH (header data for signature process) are locked.
Check if the digital signature is still being processed by user &V1&
and if necessary delete the lock entry for table SIGNH.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SIG605 - System locking error ?

  The SAP error message SIG605, which indicates a "System locking error," typically occurs when there is an issue with the locking mechanism in the SAP system. This can happen for various reasons, including:
  Causes of SIG605 System Locking Error:
  
  Database Lock Conflicts: Multiple users or processes may be trying to access the same data simultaneously, leading to a conflict in locks.
  Long-Running Transactions: If a transaction takes too long to complete, it may hold locks longer than necessary, causing other transactions to fail.
  Deadlocks: Two or more processes may be waiting for each other to release locks, resulting in a deadlock situation.
  System Performance Issues: High load on the system can lead to delays in lock acquisition and release.
  Configuration Issues: Incorrect configuration of the locking mechanism or database settings can also lead to locking errors.
  
  Solutions to SIG605 System Locking Error:
  
  
  Identify and Resolve Lock Conflicts:
  
  Use transaction codes like SM12 (Display and Delete Locks) to identify and manage locks. You can see which users or processes are holding locks and release them if necessary.
  Check for long-running transactions using SM66 (Global Work Process Overview) or SM50 (Work Process Overview) to identify processes that may be causing the issue.
  
  
  
  Optimize Transactions:
  
  Review and optimize long-running transactions to ensure they complete quickly and release locks promptly.
  Implement best practices for coding and database access to minimize lock contention.
  
  
  
  Monitor System Performance:
  
  Use performance monitoring tools to identify bottlenecks in the system that may be contributing to locking issues.
  Consider increasing system resources (CPU, memory) if the system is under heavy load.
  
  
  
  Deadlock Resolution:
  
  If deadlocks are detected, analyze the processes involved and modify them to avoid circular wait conditions.
  Implement proper error handling in your applications to gracefully handle deadlocks.
  
  
  
  Configuration Review:
  
  Review the configuration settings related to locking in the SAP system and the underlying database to ensure they are optimal for your workload.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to SIG605 or provide patches and updates.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: To view and delete locks.
  SM50: To monitor work processes.
  SM66: To monitor global work processes.
  ST22: To check for dumps that may provide additional context.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on locking mechanisms and best practices.
  
  
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who may have encountered similar issues.
  
  
  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.