How To Fix ICM051 - Unable to read HTTP access protocol

ICM051 - Overview

• Message type: E = Error

• Message class: ICM - Messages for ICM Monitor

• Message number: 051

• Message text: Unable to read HTTP access protocol

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 ICM051 - Unable to read HTTP access protocol ?

  The SAP error message ICM051: Unable to read HTTP access protocol typically indicates an issue with the Internet Communication Manager (ICM) in the SAP system. This error can occur due to various reasons, including configuration issues, network problems, or issues with the HTTP/HTTPS settings.
  Causes:
  
  Incorrect Configuration: The ICM may not be properly configured to handle HTTP/HTTPS requests.
  Network Issues: There may be network connectivity problems preventing the ICM from accessing the required resources.
  Missing or Incorrect SSL Certificates: If HTTPS is being used, missing or incorrectly configured SSL certificates can lead to this error.
  Port Conflicts: The port configured for the ICM may be in use by another service or blocked by a firewall.
  Service Not Running: The ICM service may not be running or may have crashed.
  
  Solutions:
  
  
  Check ICM Configuration:
  
  Go to transaction RZ10 and check the profile parameters related to ICM, such as icm/server_port_0 for HTTP or icm/server_port_1 for HTTPS.
  Ensure that the ports are correctly