21.   Invalid charge code supplied to PI.

22.   Please supply a valid charge code.

23.   An invalid charge code has been supplied to PI.

24.   One more important aspect of using LIFESPAN which should be explained at the outset is that every module must have a charge code associated with it.

25.   When LIFESPAN is installed, the LIFESPAN Manager sets up a series of charge codes to be used for holding modules in related sets.

26.   This displays the charge code associated with the module.

27.   This index enables you to allocate and change charge codes and their associated storage directories.

28.   Charge codes provide a mechanism for organising the storage of modules according to teams and projects, or for reasons of security or accounting.