doc.FAQ.WhatDoUsersNeedToDoToConfigureTheirMulti-TierDrivers Unix users need to ensure that openlink.sh (Bourne/Bash) or openlink.csh (C) is executed in the appropriate shell. These shell scripts set environment variables that pertain to ODBC. They appear in both client and server components installations. Unix users need to run set or env to ensure that the environment variables (ODBCINI, ODBCINSTINI, etc.) are actually set. All users need to ensure that the appropriate [Environment] section of the ~/openlink/bin/oplrqb.ini file contains the correct environment variables. For example: [Environment Informix 7.3] INFORMIXDIR = /dbs2/informix/online731 INFORMIXSERVER = openlinux DELIMIDENT = Y OPL_INF_MULTISESS = Y OPL_SPACEPADCHAR = Y CURSOR_SENSITIVITY = LOW ;FORCE_DORMANT = 1 ;FET_BUF_SIZE= 65535 ;FORCE_ONLINE_DATABASE= 1 All users should uncomment and set the PortHigh parameter that appears in the [Protocol TCP] section of the ~/openlink/bin/oplrqb.ini file. PortHigh should equal PortLow + the number of concurrent connections alloted by the license + a few extra ports. For example: [Protocol TCP] PingWatchdog = No PingInterval = 600 Listen = 5021 PortLow = 5000 PortHigh = 5075 ;IPAddress = 127.0.0.1 All users need to start the Request Broker. The Request Broker is the oplrqb executable that appears in the /bin sub-directory of Multi-Tier server components installation. It may be started with one of the following commands: oplrqb # Starts process with no logging oplrqb -dv # Write debug output to the terminal oplrqb +loglevel 7 +logfile oplrqb.log # Writes debug output to a logfile