An invalid drive error associated with a network drive occurs during installation of the program.
A user permission issue is preventing the installer from accessing the folder.
Temporarily move the RAMIS.ini file in C:\Program Data\Bentley\Engineering\RAM Structural System to a local drive or the desktop and then run the installer. After the installation completes, the RAMIS.ini file can be moved back to replace the new RAMIS.ini file that is created during the installation.