Flash Replay Wiki
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Technical wiki for creators and addon developers.

Technical troubleshooting

Common problems, likely causes and concrete checks before support.

Free downloadAll Rights ReservedNeoForge 1.21.1
Technical troubleshooting
Verified real assets
01

The mod does not appear

  • Check that you are using NeoForge and the supported Minecraft version.
  • Verify the .jar is in the correct profile mods folder.
  • Start with non-essential mods removed if you suspect a loading conflict.
02

Recording does not start

  • Check unbound or conflicting keybinds.
  • If using per-server policy, make sure the server is not OFF or MANUAL when you expect auto-start.
  • Automation is disabled by default.
03

Save Last missed the moment

  • Increase rolling retained seconds.
  • Add pre-roll and post-roll.
  • Use Hybrid for long sessions with disk limits.
  • Press the keybind soon after the event.
04

Export is slow

  • Lower resolution or FPS.
  • Disable SSAA.
  • Use lower bitrate or higher CRF.
  • Disable heavy shaderpacks or choose a lighter export shader pack.
  • Test a short range before the final render.
05

Missing or unwanted entities

Check Render Filter before reporting a bug. If you hid an entity or particle, it may still be filtered.