Message type: E = Error
Message class: /SAPAPO/SEQ -
Message number: 551
Message text: Prod. &1/loc. &2 without valid source in opt. horizon is not planned
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/SAPAPO/SEQ551
- Prod. &1/loc. &2 without valid source in opt. horizon is not planned ?The SAP error message /SAPAPO/SEQ551 Prod. &1/loc. &2 without valid source in opt. horizon is not planned typically occurs in the SAP Advanced Planning and Optimization (APO) module, particularly in the context of production planning and scheduling. This error indicates that a product at a specific location does not have a valid source of supply within the defined planning horizon, which prevents it from being planned.
Cause: No Valid Source of Supply: The product at the specified location does not have any valid source of supply (e.g., production orders, purchase orders, or stock) that can fulfill the demand within the planning horizon. Planning Horizon Issues: The planning horizon may not be set correctly, or the product may not be available for planning within that horizon. Master Data Issues: There may be issues with the master data configuration, such as missing or incorrect data in the product master, location master, or source of supply. Capacity Constraints:
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