Quick-reference material, troubleshooting guides, and migration notes. These pages are lookup material — read them when you need them, in any order.

Cheat sheet — Command patterns, logging and diagnostics flags, and a debugging checklist, on one page.
Troubleshooting — Build and setup problems, plus a general diagnostic checklist.
Runtime errors and diagnostics — Catalogue of runtime error messages and how to resolve each one.
Migrating to FhSim 3.0 — Migrating from FhSim 2.x to 3.0.
License and terms of use — License and terms of use.