I am using P6 ver 7 with Oracle express. The database crashed on me. The database would not accept any passwords. The first time this happened I reinstalled P6 and everything was fine. This time Oracle Express 10 g will not uninstall properly. I have manually removed all the instances I can find of XE. I have have cleaned out the registry. For some reason when I try to reinstall P6 Ver 7 or 8.1 the installer thinks Oracle is still installed and asks for a password. However the installer will nor accept any passwords and aborts the installation.
You first remove oracle XE . Then after you install the Primavera p6v7 or 8, Must be remove oracle XE 10g with “OracleXEUniv” installer if oracle xe in your system it’s give option that repair and remove, Select remove.
After complete this you can install the Primavera