When computing or validating a model, the following user notification is generated: Invalid demand adjustment demand pattern.
This issue will occur is a demand pattern used in the Demand Adjustments field in the Calculation Options has been deleted from the model. If you open the Demand Adjustments collection field, you will see the Pattern column for one or more of your demand adjustments will be displayed as blank. If you select a valid pattern or delete the demand adjustment, the error will no longer occur
Modeling scenarios with different demands
Multiple Demand Adjustments