The fastest troubleshooting comes from reducing uncertainty. Instead of changing multiple settings at once, identify the exact profile, reproduce the problem, and test one cause at a time.
Start from a clean reproduction
Duplicate the profile or create a test instance with the same Minecraft version and loader. Add only the dependencies and Simply Swords, then see whether the problem remains.
Crashes during startup
Version or loader mismatches are common causes. Check the first relevant error in the latest log for a named missing dependency, unsupported version or incompatible mod.
Missing items or recipes
Verify that the mod is actually loaded, then check whether your guide matches the installed release. Modpacks can also alter recipes through scripts or configuration.
Conflicts with other mods
Add other mods back in small groups until the issue returns. The group that reintroduces the issue gives you a much smaller conflict set to inspect.
If a problem begins immediately after an update, compare against the last known-good version set first. Restoring a working baseline is often more informative than continuing to stack new fixes on top of a broken profile.
Keep the main world closed while testing uncertain fixes. Use a copy of the profile and a copied or disposable world until the game starts consistently and the expected content appears. Once the environment is stable, make a fresh backup of the important world before returning to it.
Recover without damaging the main world
If the mod works in a minimal profile but fails in the full pack, disable roughly half of the additional mods and test again. Continue narrowing the set that reproduces the issue. This is much faster than toggling one random mod after another in a very large pack.
Use a binary-style conflict test
Write down the exact versions involved before changing anything. That makes it easier to compare the failing profile with a clean test and prevents accidental version drift while troubleshooting.
Logs often contain many lines after the first real failure. Start near the earliest dependency, loader or missing-class message connected with the crash rather than focusing only on the final summary. The last line may describe the shutdown while the useful cause appeared earlier.
Read errors in the order they happen
When asking someone else for help, share the version information and the relevant error text rather than a long list of every experiment you tried. A concise reproduction path—start profile, perform one action, observe one error—is usually much easier to diagnose than a heavily modified profile with an uncertain history.
Record the exact error, the version set and each change you make. This prevents repeated tests and makes it easier to notice when the symptom changes. If the crash disappears after one change, repeat the test once before concluding that the cause has been isolated.
Keep a short incident note while testing
Next steps
Return to the full Simply Swords Mod guide library for more version, loader and troubleshooting articles, or use the homepage installation and FAQ sections for a quick checklist.