I am assuming that you are now using .NET managed application so you need to use ADO instead of Pro*COBOL, is that correct?

If you are using the Oracle Data Provider ODP.NET then you should be able to connect as SYSDBA or SYSTEM but the syntax using "/" will not be recognized as a valid user/password in an ADO connection string.

You might want to run this by Oracle as it is really their software that controls this and not Micro Focus.

Thanks.