How To Fix CH136 - Connection to application & (&) cannot be established

SAP Error Message - Details

• Message type: E = Error

• Message class: CH - CAD/PP integration messages

• Message number: 136

• Message text: Connection to application & (&) cannot be established

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CH136 - Connection to application & (&) cannot be established ?

  The SAP error message CH136 indicates that there is a problem with establishing a connection to a specified application server. This can occur in various scenarios, such as when trying to connect to a database, an application server, or a service that is part of the SAP landscape.
  Causes:
  
  Network Issues: There may be network connectivity problems between the client and the application server.
  Server Down: The application server you are trying to connect to may be down or not running.
  Configuration Issues: Incorrect configuration settings in the SAP system, such as incorrect instance numbers, hostnames, or ports.
  Firewall Restrictions: Firewalls may be blocking the connection to the application server.
  SAP Router Issues: If you are using an SAP router, there may be issues with the router configuration.
  Authorization Issues: The user may not have the necessary authorizations to connect to the application server.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the client and the application server is stable. You can use tools like ping or traceroute to diagnose network issues.
  Verify Server Status: Check if the application server is up and running. You can do this by logging into the server or using SAP management tools.
  Review Configuration Settings: Double-check the configuration settings in the SAP GUI or the relevant configuration files to ensure that the hostname, instance number, and port are correct.
  Firewall Settings: Ensure that the firewall settings allow traffic on the required ports for SAP communication.
  SAP Router Configuration: If applicable, verify the configuration of the SAP router to ensure it is set up correctly.
  User Authorizations: Check the user authorizations to ensure that the user has the necessary permissions to connect to the application server.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message CH136.
  SAP Community: The SAP Community forums can be a valuable resource for troubleshooting and finding solutions from other users who may have encountered similar issues.
  Logs and Traces: Review the application server logs and traces for more detailed error messages that can provide additional context for the connection failure.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or technical support for further investigation.