A number of environment variables are guaranteed to be defined while a script is being processed by WarpIN. These are called "script variables".
In addition, since WarpIN prompts the user if a variable is referenced, but has
currently no value, as an archive creator, you can also force WarpIN to prompt the user
for additional information. See the
VARPROMPT
element for details.
WarpIN has a button on the "Configure" page just before installation starts which allows you to create a REXX script which sets all the automation environment variables according to the selections you have made. Start this REXX script before WarpIN (with the archive name), and WarpIN will use the information from the automation environment variables automatically.
Of course, you can also set all these environment variables manually. This is more error-prone though.
WARPIN_
.