Oracle Developer Suite is a suite of development tools released by the Oracle Corporation. The principal components were initially Oracle Forms and Oracle. Oracle Developer Suite contains the following main components: The two main folders are both named after the Oracle Home you chose to install 9iDS under. Machine: Windows 7 (32bit) - Oracle 11g express (32bit How to connect developer suite 10g with oracle 11g express and prevent all errors?.
This looks like Windows Try to run setup in Windows XP SP3 compatibility mode. After that I installed Oracle Developer Suite 10g to my the same computer. it was not allowing me to install this suite to the same ORACLE home.