How To Fix CMS187 - Internal Error When Checking Signature

SAP Error Message - Details

• Message type: E = Error

• Message class: CMS - KPro: Content Management Service

• Message number: 187

• Message text: Internal Error When Checking Signature

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 CMS187 - Internal Error When Checking Signature ?

  The SAP error message CMS187, which indicates an "Internal Error When Checking Signature," typically arises in the context of digital signatures and cryptographic operations within SAP systems. This error can occur in various scenarios, such as when dealing with electronic documents, secure communications, or digital certificates.
  Causes:
  
  Corrupted Digital Signature: The digital signature being verified may be corrupted or improperly formatted.
  Certificate Issues: The certificate used for signing may be expired, revoked, or not trusted by the system.
  Configuration Problems: There may be issues with the configuration of the cryptographic libraries or settings in the SAP system.
  Software Bugs: There could be bugs in the SAP software or the underlying libraries that handle cryptographic operations.
  Incompatibility: The version of the cryptographic library or the SAP system may not be compatible with the signature algorithm used.
  
  Solutions:
  
  Check Digital Signature: Verify that the digital signature is valid and correctly formatted. If possible, regenerate the signature.
  Update Certificates: Ensure that all certificates involved are valid, not expired, and properly installed in the SAP system's trust store.
  Review Configuration: Check the configuration settings related to cryptographic operations in the SAP system. Ensure that the necessary libraries are correctly configured.
  Patch SAP System: If the issue is due to a known bug, check for any available patches or updates from SAP that address this specific error.
  Consult SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or solutions for this error.
  Log Analysis: Review the system logs (transaction SLG1) for more detailed error messages that may provide additional context for the issue.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurs.
  
  Related Information:
  
  SAP Cryptographic Library: Ensure that you are using the correct version of the SAP Cryptographic Library, as it plays a crucial role in handling digital signatures.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as STRUST (for managing SSL certificates) and SSO2 (for Single Sign-On configurations).
  Documentation: Review SAP documentation related to digital signatures and cryptographic operations for best practices and troubleshooting steps.
  
  By following these steps, you should be able to diagnose and resolve the CMS187 error in your SAP system.