# Unable to Open Project after HLODS Build's Fail (Building/Deleting HLODS makes Project CRASH) **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** editor-crash, bug-report, fortnite\ **Created:** [January 27, 2026, 2:06pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258 "2026-01-27T14:06:44Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Majorrblues](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Majorrblues](https://forums.unrealengine.com/u/Majorrblues)\ **Post date:** [January 27, 2026, 2:06pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/1 "2026-01-27T14:06:44Z")
### Summary I’ve had problems building the HLODS on this island since the beginning: every time I tried to build them, I got a Fail error with a pop-up. I found a solution: changing the Cell Size and Loading Range of both the HLODS and the island’s Main Partition, allowing me to build them at least once (it didn’t work with multiple builds). I recently tried building them again using the temporary fix listed above, but the UEFN editor crashed. I tried opening it again without success, and now it won’t open anymore. It always crashes at around 72%, while ‘‘uploading plugins’’. I’ll give the relative HLODS fail’s log and Crash log in the comments. ### Please select what you are reporting on: Unreal Editor for Fortnite ### What Type of Bug are you experiencing? Assets ### Steps to Reproduce - Try to build HLODS ### Expected Result HLODs should build successfully ### Observed Result I Always receive bunch of warnings and errors in the Output Log after trying or in some cases successfully build the HLODS. Now I’m unable to open the project after a crash due to HLODS build’s fail. ### Platform(s) PC ---
**Author:** ![Majorrblues](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Majorrblues](https://forums.unrealengine.com/u/Majorrblues)\ **Post date:** [January 27, 2026, 2:07pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/2 "2026-01-27T14:07:08Z")
HLODS FAIL: [WorldPartitionHLODsBuilder-00004544-2026-01-27T12.18.14.407Z.rar](https://forums.unrealengine.com/uploads/short-url/vxDFfOHTpWnO2e0776H3ayET3XS.rar) (98.4 KB) CRASH: [UnrealEditorFortnite.rar](https://forums.unrealengine.com/uploads/short-url/tmL8hATfyI2XYI5ThmKO3K9Y23X.rar) (111.3 KB) ---
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [January 27, 2026, 3:24pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/3 "2026-01-27T15:24:45Z")
hi @Majorrblues , The log before the crash says [2026.01.27-13.53.31:076][926]LogAssetRegistry: Error: Package is unloadable: C:/Users/oibaf/Documents/Fortnite Projects/trying/Content/ExternalActors/trying/5/W2/ **B781WPOXYARM192MNVYO98**.uasset. _Reason: **Invalid value** for PACKAGE\_FILE\_TAG at start of file._ Try putting **B781WPOXYARM192MNVYO98** search box of the Asset box to find the asset then delete this The alternative is Win File explorer and find the asset above and delete the asset The probable cause is the dimensions are not the power of two [Document Resizing Textures contains error 512 is not a Power Of 2 - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/document-resizing-textures-contains-error-512-is-not-a-power-of-2/2028723) ---
**Author:** ![Majorrblues](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Majorrblues](https://forums.unrealengine.com/u/Majorrblues)\ **Post date:** [January 27, 2026, 4:09pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/4 "2026-01-27T16:09:14Z")
Hello, I tried to delete the file in the Project’s folder (since I can’t access the project from the editor) with no luck, still crashes at 72% while Loading Plugins. ---
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [January 27, 2026, 10:51pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/5 "2026-01-27T22:51:24Z")
hi @Majorrblues , Please verify your installation just in case something in UEFN is corrupted [How to verify UEFN](https://forums.unrealengine.com/t/urc-exe-and-urc-dll-get-flagged-as-malware-from-microsoft-defender/1802519/5) ---
**Author:** ![Majorrblues](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Majorrblues](https://forums.unrealengine.com/u/Majorrblues)\ **Post date:** [January 28, 2026, 9:49am UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/6 "2026-01-28T09:49:11Z")
Tried to verify and also make a fresh install of both Fortnite and UEFN, still doesn’t work ---
**Author:** ![Majorrblues](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Majorrblues](https://forums.unrealengine.com/u/Majorrblues)\ **Post date:** [January 28, 2026, 10:04am UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/7 "2026-01-28T10:04:28Z")
![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/3/3/233f45ea964f3e81fa9f809bfaf5cef90b0e330d.png) I managed to open it randomly, I think its just luck, and these errors are the errors im receiving now that I always used to have when launching the project and also after the HLODS Fail. Now I can’t launch sessions since it gives me Validation Error with just one .uasset file (which I found refers to the HLODS). I don’t know what to do since I don’t wan’t to close the editor because I might not be able to open the project again. Last time I tried to delete the HLODS from the ‘‘Build’’ Tool up in the Editor it just crashed. I need to find a way to delete HLODS safely somehow ---
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [January 29, 2026, 5:02pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/8 "2026-01-29T17:02:58Z")
hi @Majorrblues The only answer that may be of use is [VALIDATION FAIL on build HLOD packages. - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/validation-fail-on-build-hlod-packages/1989863/2) Updated for 5.5 [World Partition - Hierarchical Level of Detail in Unreal Engine | Unreal Engine 5.5 Documentation | Epic Developer Community](https://dev.epicgames.com/documentation/en-us/unreal-engine/world-partition---hierarchical-level-of-detail-in-unreal-engine?application_version=5.5) ---
**Author:** ![Majorrblues](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Majorrblues](https://forums.unrealengine.com/u/Majorrblues)\ **Post date:** [January 30, 2026, 8:03pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/9 "2026-01-30T20:03:00Z")
Well, I managed to fix it by deleting some asset files that were causing errors and made a new Default HLOD Layer. I also removed Unreal Revision Control, which prevented me from building HLODS in any other project. I probably had some luck, but thanks for the advices. Hopefully now it won’t crash again while building them… ---
**Author:** ![wouter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/wouter/32/1036116_2.png) [@wouter](https://forums.unrealengine.com/u/wouter)\ **Post date:** [January 31, 2026, 2:36pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/10 "2026-01-31T14:36:55Z")
Why would Unreal Revision Control prevent you from building HLODS in other projects? What errors do you get? ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [July 26, 2026, 2:07pm UTC](https://forums.unrealengine.com/t/unable-to-open-project-after-hlods-builds-fail-building-deleting-hlods-makes-project-crash/2695258/11 "2026-07-26T14:07:36Z")
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