You need a Variable Set (which contains the variables you need) in order to use
variables in a Preflight Profile or Action List. You can create a new one or re-use
an existing one (i.e. add any new variables as required).
Important: Although you can create more than one Variable Set, we
recommend that you keep all your variables in one Set. Only if you are working
with both PitStop Pro and PitStop Server, you might consider using different
sets. However, if you use variables of different Variable Sets within a single
Preflight Profile, only the "active" (applied) Variable Set variables will
contain values. Variables used from inactive Variable Sets will be blank!
To create or edit a Variable Set