How To Fix CHIP_API655 - Multiplicity of ports is different; combination skipped

SAP Error Message - Details

• Message type: E = Error

• Message class: CHIP_API - Messages for Generic CHIP Framework

• Message number: 655

• Message text: Multiplicity of ports is different; combination skipped

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CHIP_API655 - Multiplicity of ports is different; combination skipped ?

  The SAP error message CHIP_API655 indicates that there is a mismatch in the multiplicity of ports in a configuration, which prevents the system from processing a specific combination of components or services. This error typically arises in the context of SAP's Composite Application Framework (CAF) or when working with SAP's Business Process Management (BPM) and related technologies.
  Cause:
  The error occurs when:
  
  There is a discrepancy in the number of input or output ports defined for a service or component.
  The configuration of the components does not match the expected multiplicity (e.g., one component expects a single input while another provides multiple inputs).
  The service or component is trying to connect to another service or component that has a different number of ports defined.
  
  Solution:
  To resolve the CHIP_API655 error, you can take the following steps:
  
  
  Check Port Definitions:
  
  Review the port definitions of the components involved. Ensure that the multiplicity (number of instances) of input and output ports matches across the components.
  
  
  
  Adjust Component Configuration:
  
  If you find that the multiplicity is indeed different, adjust the configuration of the components to ensure they align. This may involve changing the number of expected inputs or outputs in the service definitions.
  
  
  
  Validate Service Compositions:
  
  If you are working with composite applications, validate the entire composition to ensure that all components are compatible in terms of their port definitions.
  
  
  
  Review Documentation:
  
  Consult the SAP documentation for the specific components you are using to understand the expected configurations and any constraints related to port multiplicity.
  
  
  
  Testing:
  
  After making adjustments, test the configuration to ensure that the error is resolved and that the components can communicate as expected.
  
  
  
  Consult SAP Support:
  
  If the issue persists after checking the configurations, consider reaching out to SAP support for further assistance, providing them with detailed information about the components and configurations involved.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP Help Portal for detailed information on the Composite Application Framework and BPM.
  Community Forums: Check SAP Community forums for similar issues and solutions shared by other users.
  Version Compatibility: Ensure that you are using compatible versions of the components involved, as version mismatches can sometimes lead to such errors.
  
  By following these steps, you should be able to identify and resolve the cause of the CHIP_API655 error in your SAP environment.