net.sf.hibernate.QueryException: in expected: m

I have a db with composite key.

ANd two classes has been created with middle gen

one class and another primary key class.

when i have to query i am getting the above error.

when i have to add data also i cannot create a sequence for any one of the attributes of the composite key.

help me in this issue.

You have not provide much information so its difficult to give you any guidence at all.

As far as sequences go and composite key fields is not directly supported. Composite keys are managed by the developer in terms of the key values. How you get those values is application specific - see the section on the 'assign' key generator attribute in the manual.