How To Fix PAB028 - Data cannot be blocked (system error)

PAB028 - Overview

• Message type: E = Error

• Message class: PAB - JIT calls

• Message number: 028

• Message text: Data cannot be blocked (system error)

What causes this issue?

In trying to lock an object for processing, an internal error was
detected in the SAP lock management.

System Response

The SAP system cannot enter the selected lock in the so-called lock
table administered by the ENQUEUE server. Therefore the ENQUEUE
function module sets an exception.

How to fix this error?

The most common reason for the existing error message is that the
ENQUEUE server can no longer be used. The cause for this can be that
either the ENQUEUE server itself or the message server, which forms the
link between application servers and ENQUEUE servers, is no longer
running.
Enquire about the appropriate servers in your system administration.

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 PAB028 - Data cannot be blocked (system error) ?

  The SAP error message PAB028, which states "Data cannot be blocked (system error)," typically indicates that there is an issue with the system that is preventing the blocking of data in the context of a particular transaction or process. This error can occur in various scenarios, such as during the processing of documents, data entry, or when trying to lock records for editing.
  Possible Causes:
  
  Database Lock Issues: The system may be experiencing issues with database locks, which can prevent data from being blocked.
  System Configuration: There may be configuration issues in the SAP system that are causing the error.
  Transaction Errors: The specific transaction being executed may have errors or inconsistencies that lead to this message.
  User Authorizations: The user may not have the necessary authorizations to perform the action that is being attempted.
  Technical Issues: There could be underlying technical issues, such as problems with the application server or database server.
  
  Solutions:
  
  Check System Logs: Review