When rebooting a server with problems, it could lead to a corrupt ingress installation.
This leads to all kind of problems. When starting the Ingres Visual Manager you get an error: “II_INSTALLATION must be set before the configuration utility is run”.
To fix this problem you need to restore the symbols.tbl file located in the ingres\files directory. If you want to restore them manually, you need to know the original settings. You can get them back with the utility: ingsetenv.exe
If you restore the file, make sure ingres is down and run after the restore the following command: ingsetenv II_GCNI2_PORT “”
If you do not know the exact settings, you can try to take a look at the install.log. The settings of the ingres environment are also mentioned their.