Tutorials

A guided path from first unzip to codegen, wire logs, and developer licences — with ExampleBank + Lucid.

Follow the numbered path or jump to any topic. Pair with 4H Academy quizzes to reinforce each step.

Getting started with 4H

Unzip the eval package, licence file, and your first ExampleBank run.

FIX tags, session vs application layer, and a minimal Logon lifecycle.

Hands-on TCP acceptor/initiator — quotes, repeating groups, and NOS → ER.

Lucid profile sample-app — complementary style to ExampleBank.

ROE → spec XML → validate → codegen → typed Java bindings.

Read server/client logs, SOH-delimited captures, and common grep patterns.

90-day eval vs annual developer licence — same engine, different tier.