You can alter the default settings for run-time options in an environment variable and in the application source code. Alternatives, from lowest priority to highest priority, are:
Use the SET command on the command line or define them in System Properties to specify run-time options by means of the CEE.OPTIONS environment variable. For example:
set cee.options=natlang(enu)
As mentioned above, there are two methods for setting options in the CEE.OPTIONS environment variable. The first method, setting CEE.OPTIONS in System Properties has lower priority than the second, using the SET command.
Run-time options specified in System Properties are the options in effect for every session you start. This is a good place to specify run-time options that you want to have in effect for every application you run.
If CEE.OPTIONS already exists in the System Properties, change or add to the existing variable.
To change run-time option settings, use a SET command with the desired settings. Each SET command completely replaces any previous SET commands, including the definition in System Properties. Therefore, you must include the settings of all run-time options from any previous SET command if you still want them in effect in each subsequent SET command.
For example, assume you have the following in your System Properties:
cee.options=natlang(jpn)
and later enter this command from the command line:
set cee.options=natlang(enu)
This means that NATLANG has returned to its default value, which is NATLANG(ENU).
To return all run-time options to the IBM-supplied defaults, set CEE.OPTIONS to a null argument:
set cee.options=
With Windows, you can group several commands, including a SET command for CEE.OPTIONS, in a command file. Running such a command file is equivalent to issuing each of the commands individually on the command line.