DBConvert requires the name of a database you want to work with to be specified. You need to know the exact database name and type it into the corresponding field named ‘Net service name or global database name’. Otherwise, Oracle server cannot be found within your net and this error appears.
Note: If you don’t know database name you will not be able to choose a schema. That’s why to know database name in Oracle is a principal factor for your work in DBConvert.