How To Fix SADL_GW_ATC_VOCAN004 - &1: &2 is mandatory

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_ATC_VOCAN -

• Message number: 004

• Message text: &1: &2 is mandatory

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 SADL_GW_ATC_VOCAN004 - &1: &2 is mandatory ?

  The SAP error message SADL_GW_ATC_VOCAN004 typically indicates that a mandatory field is missing in the context of an OData service or a data model operation. This error is often encountered when working with the SAP Gateway and the SAP Application Development Framework (SADL).
  Cause:
  The error message SADL_GW_ATC_VOCAN004 is triggered when a required field (denoted by &2 in the message) is not provided in the request. This can happen in various scenarios, such as:
  
  Missing Mandatory Fields: The request to create or update an entity does not include all the mandatory fields defined in the data model.
  Incorrect Mapping: The mapping between the frontend and backend might not be correctly set up, leading to missing data.
  Validation Rules: There may be validation rules in place that require certain fields to be populated before the operation can proceed.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Data Model: Review the data model definition to identify which fields are marked as mandatory. This can usually be found in the metadata of the OData service.
  
  
  Review the Request Payload: Ensure that the request payload includes all mandatory fields. If you are using a frontend application (like SAP Fiori), check the input forms to ensure all required fields are filled out.
  
  
  Debugging: If you have access to the backend, you can debug the OData service to see what data is being received and where it might be failing.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific OData service you are using to understand the required fields and their constraints.
  
  
  Error Handling: Implement error handling in your application to provide user-friendly messages when mandatory fields are missing.
  
  
  Related Information:
  
  SAP Gateway: Understanding how the SAP Gateway works and how it handles OData services can provide insights into how to troubleshoot these types of errors.
  OData Services: Familiarize yourself with OData service development and consumption, including how to define and consume services in SAP.
  SAP Community: Engage with the SAP Community forums for additional support and to see if others have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.