When opening a particular *.dm2 or *.dmx Case Studio project file using Toad Data Modeler 3.x, the following error appears:
"Database 30 is not supported"
The model project was created for Oracle 8 (Oracle Database ID for Oracle 8 is 30 from Case Studio help file) which is not supported in Toad for Data Modeler version 3.x.
Toad for Data Modeler 3.x only supports Oracle database 9, 10g, and 11g. Using Case Studio, convert the Oracle 8 model to an Oracle 9, 10g, or 11g model before importing it to Toad for Data Modeler 3.x.