A.1. Environment Setup Requirement for Linux Only

Note: Before launching any Ansys Forte interface component, several environment settings must be in place, as described in Java Memory Settings.

Ansys Forte and related products require a few environment variables that help them to operate properly. These environment variables are shown in Table 1: Ansys Forte environment variables.

The UNIX installation script creates two files, forte_setup.csh (C-shell) and forte_setup.ksh (K-shell), which define variables and aliases based upon the selections chosen during the install. They are located in the bin directory.

Source Environment Variables in a C-Shell:

You can source the product environment variables in a C-Shell using the command line. For example, if your installation is in the $HOME/ansys_inc directory, and you have installed v242, then you would use this command to set up Ansys Forte:

source $HOME/ansys_inc/v242/reaction/forte.linuxx8664/bin/forte_setup.csh

Source Environment Variables in a Bash, Korn, or Bourne Shell:

You can source the product environment variables in a Korn or Bourne shell using the command line. For example, if your installation is in the $HOME/ansys_inc directory, and you have installed v242, then you would complete the following steps to set up Ansys Forte:

Source the Ansys Forte environment variables with the following command. Remember that the period and space are required at the beginning of the command line.
```
. $HOME/ansys_inc/v242/reaction/forte.linuxx8664/bin/forte_setup.ksh
```

To do this in a csh or tcsh environment, put the following into $HOME/.login:

source $HOME/ansys_inc/v242/reaction/forte.linuxx8664/bin/forte_setup.csh

Note: The shell scripts used to run the user Interface are Bourne shell scripts and use the forte_setup.ksh file to source the environment. Therefore, even if all users work in the C shell environment, the forte_setup.ksh file is used also.

Table 1: Ansys Forte environment variables

Variable	Description
$REACTION_DIR	This is a required variable. It points to a subdirectory where the Ansys Chemkin and Ansys Forte are installed and a mechanism data directory exists. An example would be (where NNN is the ANSYS release number code): $HOME/vNNN
$FORTE_BIN	Required by Ansys Forte. It points to the location of the bin directory for the Ansys Forte installation.
$PATH	The value $FORTE_BIN should be prepended to the $PATH variable.
(LD_LIBRARY_PATH)	This is a required variable.
$FORTE_USER	This is an optional FORTE variable. This is not automatically defined. The variable is used in the naming of the preferences file.
$FORTE_MEMORY	Optional variable defining how much memory to allocate to the Java Virtual Machine running the Ansys Forte interface. If not defined, you are prompted for this value.