You get this error when using the Application Security Wizard in Iron Speed Designer:
Unreachable Roles Table
It is not possible to edit your security settings because your Roles table is currently unreachable.
This error can occur when your Oracle database DLLs are not properly registered.
Re-register your Oracle DLLs, e.g.:
regsvr32 C:\oracle\product\10.2.0\client_1\BIN\OraOLEDB10.dll
Part IX: Troubleshooting Applications
Application Generation and Compilation Error Messages