How To Fix CN805 - System error when locking

CN805 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 805

• Message text: System error when locking

What causes this issue?

An error occurred when you attempted to lock Table AFAB.

System Response

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

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

INCLUDE 'NA_ALLG_SYSTEMVERW'

Error message extract from SAP system. Copyright SAP SE.

CN805 - Details

• The SAP error message CN805 ("System error when locking") typically occurs when there is an issue with the locking mechanism in the SAP system. This can happen for various reasons, including database issues, inconsistencies in the lock table, or problems with the application itself.
  Causes:
  
  Database Lock Issues: The database may have encountered a problem that prevents it from properly managing locks.
  Lock Table Overflow: The lock table may be full, which can prevent new locks from being created.
  Inconsistent Lock Entries: There may be inconsistencies in the lock entries, possibly due to a previous system crash or improper termination of a transaction.
  System Resource Issues: Insufficient system resources (like memory or CPU) can lead to locking problems.
  Transport Issues: If the error occurs during a transport, it may be related to the transport process itself.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. You can delete any unnecessary or stale locks