Exceptions initialising the descriptors

Question

I seem to be getting errors when the Toplink project is getting initialized at startup. The exceptions seem to be due to the type of inheritance that is used on the parent class.
The issue is that, I have a parent class which has several children classes, however when I have the Inheritance setup us an Indicator value, it throws these exceptions:
EXCEPTION [TOPLINK-108] (TopLink (WLS CMP) - 9.0.3 (Build 423)): oracle.toplink.exceptions.DescriptorException EXCEPTION DESCRIPTION: Cannot find value in class Indicator mapping in parent descriptor [Descriptor InterestType --> [DatabaseTable(INT_TYPE)])].DESCRIPTOR: Descriptor(CMPFLoanTypeDebitRate --> [DatabaseTable INT_TYPE)])
EXCEPTION [TOPLINK-41] (TopLink (WLS CMP) - 9.0.3 (Build 423)): oracle.toplink.exceptions.DescriptorException EXCEPTION DESCRIPTION: A non-read-only mapping must be defined for the sequence number field. DESCRIPTOR: Descriptor(CMPFLoanTypeDebitRate --> [DatabaseTable(INT_TYPE)])
However, when I set the Class Name as the Indicator within the Inheritance policy it seems to work fine.
Any help would be much appreciated?
Thanks
Tim.

Answer 1

Thanks for your reply, however the two tables seem to be the same in the db as to what it is in the mapping workbench. I generate the db tables directly from the toplink workbench through the SQL generator.
I must also note that all the classes, both parent and child classes, are using the same table (INT_TYPE).