Are there any considerations when upgrading to a newer version of Oracle?
Yes. When you install MicroStation GeoGraphics, you are asked to select the desired Oracle installation to be used. The path to the Oracle client files is stored in the configuration variable MS_ORACLE_HOME. If it becomes necessary after GeoGraphics has been installed, to change the version of Oracle, you must modify MS_ORACLE_HOME in the ..\Bentley\Program\MicroStation\config\appl\sdodgn.cfg file.