How To Fix SA666 - Not allowed in READ_ONLY version

SA666 - Overview

• Message type: E = Error

• Message class: SA -

• Message number: 666

• Message text: Not allowed in READ_ONLY version

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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SA666 - Details

• The SAP error message SA666, which states "Not allowed in READ_ONLY version," typically occurs when you attempt to perform an operation that modifies data in a system that is currently in a read-only mode. This can happen in various scenarios, such as when the system is in maintenance mode, during a system upgrade, or when a specific transaction is restricted to read-only access.
  Causes:
  
  System Maintenance: The SAP system may be undergoing maintenance or upgrades, which can put it into a read-only state.
  Database Locking: The database may be locked for certain operations, preventing any modifications.
  User Permissions: The user may not have the necessary permissions to perform write operations in the current context.
  Transport Requests: If you are trying to import transport requests or make changes to the system configuration, and the system is in a read-only state, this error can occur.
  
  Solutions:
  
  Check System Status: Verify if the system is indeed in a read-only state.