ERROR - Hibernate - org.hibernate.MappingException: Unknown entity:

Error

org.hibernate.MappingException: Unknown entity: <Entity Name >

Cause

Entity class mapping is not known to Application and Hibernate. Enitity might not be defined within hibernate configuration file(s).

Possible Resolution 

Search for other entities within the workspace and find how entities have been mapped to the table in the hibernate configuration file(s) or hbm files.

Add the respective entity too the way other entities have been configured and mapped.

If the mapping is already there within hbm files, Make sure that hbm file entry has been made within main hibernate configuration file.

** If you are using maven, make sure to perform a clean install after making the change.