How To Fix TN404 - No semaphore available -> Status is not set

TN404 - Overview

• Message type: E = Error

• Message class: TN - Support Package Manager (SPAM) Messages

• Message number: 404

• Message text: No semaphore available -> Status is not set

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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Smart SAP Assistant

• What is the cause and solution for SAP error message TN404 - No semaphore available -> Status is not set ?

  The SAP error message TN404 "No semaphore available -> Status is not set" typically indicates an issue related to the transport management system (TMS) in SAP. This error occurs when the system is unable to acquire a semaphore, which is a synchronization mechanism used to control access to shared resources in a concurrent system.
  Causes:
  
  Semaphore Limit Reached: The maximum number of semaphores that can be created has been reached. This can happen if there are too many transport requests or processes running simultaneously.
  System 
  Configuration Issues: Incorrect configuration of the transport management system or the underlying operating system can lead to semaphore allocation issues.
  Resource Exhaustion: The server may be running low on resources, such as memory or process limits, which can prevent the creation of new semaphores.
  Operating System Limits: The operating system may have limits on the number of semaphores that can be created, which can be configured in the system settings.
  
  Solutions:
  
  
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