Message type: E = Error
Message class:  EA - IDoc Basis Messages 
Message number: 429
Message text: The IDoc syntax is correct.
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The SAP error message EA429 indicates that the IDoc (Intermediate Document) syntax is correct, but there may be other issues preventing the IDoc from being processed successfully. Here’s a breakdown of the potential causes, solutions, and related information for this error: Causes: Mapping Issues: The IDoc structure may be correct, but the data mapping to the target system or application may be incorrect. Business Logic Errors: The data contained in the IDoc may not meet the business rules or validations defined in the target system.
Configuration Issues: There may be configuration problems in the IDoc processing settings, such as partner profiles or message types. Missing Data: Required fields may be missing or contain invalid values, even if the syntax is correct. Application-Specific Errors: The receiving application may have its own validation rules that are not being met. Solutions: Check IDoc Data: Review the data contained in the IDoc to ensure that all required fields are populated correctly and
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