Message type: E = Error
Message class:  PPH_FCDM - Forecast Demand Messages 
Message number: 028
Message text: No Factory Calendar found for plant &1
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The SAP error message PPH_FCDM028: No Factory Calendar found for plant &1 typically indicates that the system is unable to find a factory calendar associated with the specified plant. This can occur in various scenarios, particularly in production planning and scheduling processes.
Cause: Missing Factory Calendar: The most common cause is that a factory calendar has not been defined for the specified plant in the system. Incorrect Plant Configuration: The plant may not be properly configured in the system, leading to the absence of a factory calendar. Data Migration Issues: If data has been migrated from another system, the factory calendar may not have been transferred correctly. Authorization Issues: Sometimes, the user may not have the necessary authorizations to view or access the factory calendar.
Solution: Define a Factory Calendar: Go to the transaction code SCAL (Factory Calendar). Check if a factory calendar exists for the specified plant. If it does not exist, create a new factory calendar and assign
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