Message type: E = Error
Message class:  IDFIHU - FI Developments for Hungary 
Message number: 317
Message text: SD invoice &: Invoice Type cannot be determined by SD doc. cat. &
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The SAP error message IDFIHU317 indicates that the system is unable to determine the invoice type based on the sales document category. This typically occurs in the context of billing and invoicing processes within the Sales and Distribution (SD) module of SAP.
Cause: The error can arise due to several reasons, including: Missing Configuration: The invoice type may not be properly configured in the system for the specific sales document category. Incorrect Sales Document Category: The sales document category used in the transaction may not be linked to a valid invoice type in the configuration. Custom Development Issues: If there are custom developments or enhancements in the billing process, they may interfere with the standard determination logic. Data Inconsistencies: There may be inconsistencies in the master data or transaction data that prevent the system from determining the correct invoice type.
Solution: To resolve the error, you can take the following steps: Check Configuration: Go to the SAP Customizing Implementation Guide
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