Next: Multi-level operations
Up: ECS SYSTEM ARCHITECTURE
An ECS action, or a subprocess, could return with an F-return,
distinct from an error. In particular, the ECS system returned with
F-return when an attempt was made to reference data in a non-existent
portion of a file. This F-return was processed in either of two ways.
The simplest was to reflect it to a program jump in the calling