ModsFinder

AE2 Sophisticated Backpacks FIX

by MagmaIce

AE2 Sophisticated Backpacks FIX patches an Applied Energistics 2 import crash that appears when Import Bus pulls items from Sophisticated Backpacks on Fabric, for 1.19.2.

FabricServer-side onlyMIT LicenseOpen source1.19.2

What it does

The patch is a lightweight mixin on the Redirect StorageImportStrategy path, and it runs only on the server. When an Import Bus reads an external inventory such as a Sophisticated Backpacks backpack, the original code could throw a NullPointerException and stop the server tick. The mod adds a safety check that catches this case, so the server keeps ticking normally. The mod requires Applied Energistics 2 and is published for Fabric only, at version 1.0-SNAPSHOT for 1.19.2.

Key features

  1. Crash prevention on import

    A mixin intercepts the internal item check during AE2 item import and stops an empty result from crashing the server.

  2. Import Bus safety gate

    A safety gate handles the case where an external inventory reports nothing, so the import process skips it rather than failing.

  3. Normal ticking preserved

    When the inventory is empty or invalid the patch lets the process continue without interference, keeping the server tick intact.

Compatibility

Latest build for each game version and loader.

1.19.21.0-SNAPSHOT
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Applied Energistics 2AE2: A popular automation and storage mod
Required

How it compares

Full comparison

EnderBackpack is a Fabric mod for 1.19.4 with a client and server environment, under the MIT License, and it is not open source. Server Backpacks is server-side only, open source under CC0 1.0 Universal, and covers 1.17.1 – 1.18.1. Neither one patches the AE2 import crash that this mod addresses.

ModLoadersGame versionsEnvironmentUpdated
AE2 Sophisticated Backpacks FIXFabric1.19.2Server-side only2026-02-22
EnderBackpackFabric1.19.4Client and server2023-04-15
Server BackpacksFabric1.17.1 – 1.18.1Server-side only2022-01-23

Questions

Does Sophisticated Backpacks Fix need Applied Energistics 2?

Yes. Applied Energistics 2 is a required dependency, so it must be installed alongside the mod on Fabric for 1.19.2.

In the catalog

AE2 Sophisticated Backpacks FIX is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 12,559 mods support Minecraft 1.19.2.

Optimization mods3,545Fabric modsMods for 1.19.212,559

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What the author says

This mod addresses a specific NullPointerException (NPE) that occurs when Applied Energistics 2 (Import Bus) attempts to extract items from certain external inventories, most notably from the Sophisticated Backpacks mod on Fabric. Some inventories occasionally return a null iterator when queried for their contents…
MagmaIce, on the Modrinth page

Official listing

Owner
MagmaIce
Published
2026-02-22
Updated on Modrinth
2026-02-22
Facts verified
2026-10-15

Tags

OptimizationStorageUtility
Open on ModrinthCompare