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Table of Contents
This reference was written for Fallout 4 and may be only partially applicable to other games.
This page is under construction.
Archives (BA2)
There are two archive formats and each has it's own limit.
The total number of archives is not relevant to the limit.
- General: 256 — Exceeding this results in a crash at the main menu.
- Texture: 256 — Exceeding this causes the game to load the wrong textures for objects.
There is currently no bug-free way to increase these limits.
Mods that attempt to increase the limit should have those options disabled.
Modules (ESM/ESL/ESP)
There are two types of modules (also known as plugins): Full and Light.
Any module with the .esl file name extension or the ESL flag set in its file header is a Light Module.
This can include .esm and .esp files.
All other modules (i.e. .esm and .esp without the ESL flag) are Full Modules.
- Full: 254
- Light: 4096
Form ID Range
Fallout 4 supports two Module HEDR versions: 0.95 & 1.00.
With v1.00 the maximum number of new records was increased by allowing use of Form IDs in the extended range, doubling the capacity for new records in ESL-flagged files.
In v0.95, Form IDs in the extended range were treated as overrides of hard-coded records in Fallout4.exe.
Overrides of records from other modules do not contribute to this limit.
- Extended Range: 001-7FF (2047 IDs; 000 is the TES4 Header Record)
- Light Module v0.95: 800-FFF — 2048 New Records
- Light Module v1.00: 001-FFF — 4095 New Records
- Full Module v0.95: 800-FFF — 16,775,168 New Records
- Full Module v1.00: 001-FFF — 16,777,215 New Records
Reference Handles
This section under construction.
Open File Handles
This section under construction.