I dont understand: "Could not instantiate bean"

[joao.clemente]

I'm trying to use an app that has a session and and entity bean. The session works fine and I can fill in a form with values that will get in the entity bean.
When I submit the form, the entity bean gives out an error.

I think that something is wrong in some descriptor file regarding to this entity bean (or maybe I need a jwas.xml file that I don't have) cause this is running fine in a Sun reference implementation machine.

The error I get is

[ERROR,MemberEJB] TRANSACTION ROLLBACK EXCEPTION:
javax.transaction.TransactionRolledbackException: Could not instantiate bean; nested exception is:
java.lang.InstantiationException: puc/enterprise/MemberBean; nested exception is:
java.rmi.ServerException: Could not instantiate bean; nested exception is:
java.lang.InstantiationException: puc/enterprise/MemberBean
java.rmi.ServerException: Could not instantiate bean; nested exception is:
java.lang.InstantiationException: puc/enterprise/MemberBean



As U see, I get a lot of "Could not instatiate bean" an therefore I think this is somewhat related or to Jaws...

Anyone has seen this kind of error?

[ebilange]

Hard to say but possible cause would be:
your ejbCreate method encounters an uncatched exception, hence the creation fails and the container tries to roll back transactions.
If you're manipulating relations, there may be some exceptions too that cause this error.

[troyd]

I am getting the same exact error and for the life of me I can not figure it out. Only happens on Entity beans though.

If anyone has come across this one and have found the fix, please pass it on.

Thanks
Troy