When adding Unmapped fields(ones we do not intend to link up with any datasource field on the entity itself) to a data entity in Dynamics 365. You may receive the below compile error:
The property ‘ComputedFieldMethod’ must be set with the name of a valid data entity method if ‘IsComputedField’ is set to ‘Yes’.
Solution:
This is because AX is expecting a computed method for it within the entity, when we do not intend to create that we need to Set the Is Computed Field property under Mics group to No
Mohsin Khalid 