Incorrect variable path causes errors during install

Symptom

Installing Rational ClearCase as root on UNIX or Linux results in the following error:

>> Starting ClearCase Product Family software
***********************************************************************
The following command was executed, but returned an error:

             /opt/rational/clearcase/etc/clearcase start
>/var/tmp/ATRIA.run_cmd_output 2>&1

          The following is the command output:
         ----
         ClearCase daemons: Albd server startup error(4:1)
albd_server lockmgr -q 1024 -u 256 -f 256
Loading MVFS ...
Mounting public VOBs...
cleartool: Error: The ClearCase host '<host-name> is installed in a client-only configuration. It cannot be contacted for ClearCase services.
cleartool: Error: Unable to find albd_server.
Trouble mounting public VOBs(32:1)

          ----
         End of command output.

ERROR:
Something went wrong when we tried to start your servers and possibly load the MVFS into your kernel.  Please review the above output from the "/opt/rational/clearcase/etc/clearcase" script for information on the problem, then refer to the product Release Notes for details on how to correct the problem.

Stopping prematurely due to encountered errors.
FINAL:<host-name>       Errors:1        Warnings:0
        Log file for this session:
/var/adm/rational/clearcase/log/Rational_install.<date-time stamp>