How To Fix /IWBEP/CM_CP030 - Serialization error: 'Edm.&1' with value '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 030

• Message text: Serialization error: 'Edm.&1' with value '&2'

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_CP030 - Serialization error: 'Edm.&1' with value '&2' ?

  The SAP error message /IWBEP/CM_CP030 Serialization error: 'Edm.&1' with value '&2' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a problem with serializing a specific data type (denoted by Edm.&1) into the OData response, where &2 represents the value that is causing the issue.
  Causes:
  
  Data Type Mismatch: The value being serialized does not match the expected data type defined in the OData model. For example, if the model expects a string but receives a number or a null value.
  Invalid Characters: The value may contain invalid characters that cannot be serialized properly, such as special characters or control characters.
  Null or Undefined Values: If the value is null or undefined and the OData model does not allow nulls for that property, it can lead to serialization errors.
  Incorrect Model Definition: The OData service might have an incorrect or incomplete definition of the entity type or property in the metadata, leading to serialization issues.
  
  Solutions:
  
  Check Data Types: Verify that the data types in your backend (e.g., ABAP structure) match the expected data types in the OData service. Ensure that the values being sent conform to the expected types.
  Sanitize Input Values: Ensure that the values being serialized do not contain invalid characters. You may need to sanitize or validate the input data before serialization.
  Handle Null Values: If the property can be null, ensure that the OData model is defined to accept null values. If not, ensure that the backend logic provides valid values.
  Review OData Model: Check the OData service metadata to ensure that the entity types and properties are correctly defined. Make any necessary adjustments to the model.
  Debugging: Use debugging tools to trace the data being sent to the OData service. This can help identify the exact value causing the serialization error.
  
  Related Information:
  
  SAP Gateway: This error is often encountered in the context of SAP Gateway services, which expose backend data as OData services.
  OData Protocol: Understanding the OData protocol and how it handles data types can be beneficial in troubleshooting serialization issues.
  SAP Notes: Check SAP Notes and Knowledge Base Articles for any known issues or patches related to this error message.
  Transaction Codes: Use transaction codes like /IWFND/MAINT_SERVICE to manage OData services and /IWBEP/REG_SERVICE to register or check the status of OData services.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.