How To Fix 6D166 - Application &1 is currently blocked by &2

6D166 - Overview

• Message type: E = Error

• Message class: 6D - Real Estate Messages

• Message number: 166

• Message text: Application &1 is currently blocked by &2

What causes this issue?

The application is currently being processed by another user and the
relevant data is blocked.

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?

Try to save the application later.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 6D166 - Application &1 is currently blocked by &2 ?

  The SAP error message 6D166 indicates that a specific application (denoted as &1) is currently blocked by another user or process (denoted as &2). This typically occurs in scenarios where multiple users or processes are trying to access or modify the same data or application simultaneously, leading to a lock situation.
  
  Cause:
  
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. When one user or process is working on a particular application or data set, it locks that resource to prevent others from making changes until the lock is released.
  Long-running Transactions: If a transaction takes too long to complete, it can hold locks for an extended period, causing other users to encounter this error.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks, leading to this error.
  User Sessions: Sometimes, a user may have multiple sessions open, and one