How To Fix STRUSTCR037 - Communication error with &1

SAP Error Message - Details

• Message type: E = Error

• Message class: STRUSTCR - Certificate Revocation Configuration

• Message number: 037

• Message text: Communication error with &1

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message STRUSTCR037 - Communication error with &1 ?

  The SAP error message STRUSTCR037, which indicates a "Communication error with &1," typically occurs in the context of Secure Network Communications (SNC) or when dealing with SSL/TLS connections in SAP systems. The "&1" in the message usually represents the hostname or IP address of the server that the SAP system is trying to communicate with.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target server.
  Configuration Errors: Incorrect configuration of the SSL/TLS settings in the SAP system or on the target server.
  Certificate Issues: Problems with the digital certificates, such as expired certificates, untrusted certificate authorities, or missing certificates in the trust store.
  Firewall Restrictions: Firewalls or security groups may be blocking the communication on the required ports.
  SNC Configuration: If using SNC, there may be issues with the SNC library or its configuration.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to verify that the SAP system can reach the target server.
  Ensure that the correct hostname or IP address is being used.
  
  
  
  Review SSL/TLS Configuration:
  
  Check the SSL/TLS settings in the SAP system (transaction STRUST).
  Ensure that the SSL configuration is correct and matches the settings on the target server.
  
  
  
  Validate Certificates:
  
  Use transaction STRUST to check the certificates in the SAP system's trust store.
  Ensure that the certificates are valid, not expired, and that the certificate chain is complete.
  If necessary, import the required certificates into the trust store.
  
  
  
  Firewall and Security Settings:
  
  Verify that the necessary ports (e.g., 443 for HTTPS) are open and not blocked by firewalls.
  Check any security group settings if the systems are hosted in a cloud environment.
  
  
  
  SNC Configuration:
  
  If using SNC, ensure that the SNC library is correctly installed and configured.
  Check the SNC parameters in the SAP system profile.
  
  
  
  Check Logs:
  
  Review the SAP system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that may provide more context.
  
  
  
  Related Information:
  
  Transaction STRUST: This transaction is used to manage SSL certificates and trust relationships in SAP.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to STRUSTCR037.
  Documentation: Refer to SAP documentation on SSL/TLS and SNC configuration for detailed guidance.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.